Into his cups
Drunk, inebriated, sossed
He downed the beers so rapidly that within a half hour he was well into his cups
in his cups
in his fighting spirit and/or drunk
He is usually a little timid when he was talking to his wife, but nobody in the bar can beat him when he's in his cups!
in his World cups
so exited by the World Cup extravaganza that one is literally like one intoxicated.
He is in his World cups to such an extent that he sometimes forgets to eat.