Top Definition
adjective
1-something good for accomlishing an ends.2- something thats all around good.3- something perfectly fitting for the moment

the opposite of effant is ineffant, which means it sucks
1- this gun is effant for killing that guy who raped my girlfriend. 2- dude this weed is effant. 3- dude, i am so fuckin high, that ice cream truck is effant for my munchies
by eetumupp14 September 16, 2007
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