RevAnge.

You won't find it any dictionary ... yet.

Its meaning?

The reaction from Celtic when you beat Ange Postecoglou's team.

Robbie Neilson's Hearts thoroughly enjoyed defeating his side on the opening day of the season at Tynecastle 15 days ago but the Edinburgh men had the misfortune of playing the same opposition on League Cup duty this afternoon at Celtic Park.

Celtic discovered the joy of six last week against Dundee last Sunday as James McPake's newly-promoted Dark Blues were swept aside in a ridiculously one-sided affair.

The feel-good factor continued unabated as Ange's men dished out another defeat in Glasgow's East End.

This time the victims were Hearts as the capital club were beaten 3-2 in this one-sided League Cup second round tie.

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Celtic may have emerged bloodied and bruised from the Premiership curtain-raiser but it was the men in maroon who were battered in this cup encounter.

The Premier Sports cup match was in stark contrast to the league outing as it was a case of winner takes all in this clash.

In the lead-up to the match, a simple four words spoken by Ange sounded pretty ominous for the Tynecastle men before a ball had been kicked in anger.

"It will be different....", said the 55-year-old Aussie in a matter of fact kind of way which perfectly summed up the mood music.

It was different all right and then some.

Ask any player from any club and they will always tell you that revenge never enters their mind whenever they cross the white line that leads on to the football field.

They are being economical with the truth.

It's human nature to want to put one over on a rival who beat you in the previous match especially if the memory is barely a fortnight old.

Two weeks ago, Hearts poked a wounded animal who were still smarting from losing their Premiership crown and enduring their first barren season in a decade.

Make no mistake Celtic were caught cold that night. They were most definitely hurting from that defeat and, based on today's tempo from the off, it was clear they desperately wanted to put things right.

Ange threw the home support a curveball when he included Odsonne Edouard in the starting line-up as he partnered the Frenchman alongside new Celtic hero Kyogo Furuhashi in the attack.

There was still no sign of Israeli wide man Liel Abada and Ryan Christie was absent altogether due to injury but with the return of James Forrest to the first-team fold, it was very much an attack-minded eleven.

Recent midfield signing James McCarthy had to be content with a place on the substitutes bench.

Ironically Ange also claimed in the build-up to this match that he did not lay down markers.

Try telling that to Hearts.

Nobody told the Celtic players either as they were utterly relentless as Ange's side pummelled Hearts into submission in this one.

There was a hunger and a desire about his team as they drove forward with a zip, zest and vigour that was missing for the whole of the last campaign. In reality, it was all over as a contest by the interval as Celtic sailed into a 2-0 lead courtesy of goals from Edouard and Stephen Welsh.

The only mystery was that the winning margin at the break was not a lot more.

Celtic were scintillating, exhilarating, electrifying and broke forward at incredible speed.

High tempo, high press, pace, energy, intensity - you name it, whatever Celtic did, it was to the highest standard.

How the Paradise crowd lapped it all up.

Hearts simply had no answer and whenever they did get possession it was almost immediately surrendered.

READ MORE: New Celtic hero Kyogo Furuhashi will give assistant referees sleepless nights by living life on the edge

A slight wobble for a five-minute spell in the second period which saw Hearts reduce the arrears to 2-1 via Liam Boyce's penalty - needlessly conceded by Carl Starfelt - might have been a slight concern to Ange.

The storm was temporary and a mere blip on a rampant display that should have produced more goals.

A third goal brilliantly taken by Kyogo took his tally to five in as many appearances as normal service was resumed after another lightning-quick counterattack and sublime pass by Tom Rogic.

What a difference a fortnight makes. 

A dish best served cold so they say.

You get the feeling that this was Celtic's and perhaps more importantly their manager's way of exacting RevAnge.

New system, new style, new players - new Celtic.

Incidentally, Scottish football has accidentally stumbled across a new word to add to its lexicon.

RevAnge. Hearts certainly won't be the first or last team to incur its wrath.