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1. The act when a male is intoxicated and has sexual intercourse with somebody, and half-way through, he sobers up, realising his partner's physical features represent a decomposing trout inside a balanese prostitute, and as a result the male's penis then becomes flacid.

2. Noun. A word to describe someone who is likely to cause flibblegicking.
1. "Man, after the pub I went to this chick's house, but then I totally sobered up and flibblegicked!"
2. "Dude, Sarah is a grade-A flibblegicker..."
by Heckles June 26, 2007
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