Top Definition
1. (n.) A condition involving a prolonged state of intoxication, caused by a night of heavy drinking and lasting until morning

2. (adj.) Exhibiting symptoms of yesterdrunkenness
1. Allison's roommate advised her to skip her morning chemistry class and remain in the room until her yesterdrunk wore off, for fear that the professor would notice her obvious state of intoxication.

2. Jesus, Peter, get off the table and eat your pancakes! You're completely yesterdrunk!
by knizzleJ August 03, 2011
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