Having a belly full of beer and a mind that's just as liquid. Being drunk on beer and stupid at the same time.
Bob was so beered-up that he tripped on his own feet and fell face-first into the fireplace while laughing as if his actions were excellententertainment.
1) To get Beersdin. The act of getting drunk, normally by gunning an excessive number of beers, to the extent you are no longer capable of leaving the building.
2) To be Beersdin. Drinking enough beers while in one place so that you become surrounded by so many empty cans you are unable to move.
1) Tell everyone to grab a crate on the way over. We're getting Beersdin!
2) Last night, I was so Beersdin, I couldn't even get up to hit on that razzle bitch with the huge chebbs.