Cramberry juice is any energy drink or a beverage loaded with caffeine and/or sugar that you drink while studying (or more appropriately, cramming) for a big test or exam.
A sex move in which a guy, while sticking his dick in a girls vagina proceeds to cram his balls into her asshole, thus resulting in the balls to be covered with shitty chocolate glaze.
when strong bad is trying to find a repleacement, he makes others gothrough a series of test, such as making fun of names. one of those names was crambert.
strongbad: i'm gonna hold up a last name and you make fun of it....gargleman.
homestar: crapface
SB: dumweiner.
HS: crapface
SB: crambert
HS: crapface!?
SB: desterhoft
HS: let me think about it.... crapface.