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1.
1) People who drink (particularly females and college freshmen) and instantaneously claim they are drunk/intoxicated, and continue to do so by saying, "OHHHHHH MYYYYYY GODDDD I'm SOOOOOO drunk!"
2) People who can be in the same room as alcohol and suddenly become morons, acting as if they just took a full keg to themselves.
Have you noticed every time Megan takes the first sip out of her beer, within minutes she starts to claim she's "SO drunk"? What a pseudodrunk.
by Jaymi May 16, 2007
 
2.
When someone has the behavior of being drunk without them actually consuming alcohol.
Stewie Griffon was acting pseudo drunk when he drank apple juice and thought it was wine.
by hdeedee2 June 10, 2011