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1.
A measure of fuckability based on the weight of a female. It is defined by the ratio of "would have sex wtih" to the "effectiveness at which her boobs are able to cover a man's penis".

G=S/T
Girlant=(sexability)/(tit fuckability)

May also be used as a measure of a male's intoxication level.
Jenny's much more girlant now the she is snorting cocaine. It's too bad her titties are too small to fuck.
by 4chan4life April 27, 2010
 
2.
the opposite of buoyant.
Meghan can hold very long under water tea parties because she's just so girlant.
by becca w August 20, 2005