Noun: Nickname relating to alter-ego of those seriously detrimentally affected by alcohol due to rapid imbibing. Key indicators include vertical swaying (aka loss of balance, bumbling into everything/everyone), limited eyelid function, dazed smiling and the continual 'thumbs-up'.
Verb; To Günter: To rapidly, and often subtley, imbibe signficant quantities of alcohol and subsquently display the characteristics described above.
"Did you notice Günter was out last night?"
'Yeah, he drank twice as much as everyone else then bumbled round the club all night, not fully opening his eyes. He seemed happy though...'
"That guy was completely Güntered last night, he fell asleep in the cupboard with a pizza on his lap"