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1.
The personality type of one constantly trying to squeeze as much money as possible out of friends or loved ones, especially on an online role playing game. May also commit acts of random leeching and ninja looting.
Oh god, this guy is such an avien.
by Lotallion September 12, 2006
 
2.
The act of giving a woman's vagina a noogie.
Man last night I gave Tonya an avien!
by withaK September 06, 2006