1 definition by gds

Top Definition
usually means: The union of gametes to form a zygote; conjugation.

In this case: (A type of HANGOVER) The one of a kind, lingering,motor skill impairing,vegetating in bed all day, and hibernation causing HANGOVER you get from drinking Zygo Vodka.May also cause you to make strange complaining noises and grunts like:"whaaaa"or"ughhh"
"Holy hangover batman!..I have serious zygosis this morning..this open bar shit has to stop."

"ugh...water..please!"
by gds February 03, 2008

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