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1. A female who can give some intense blowjobs.
2. The result of an extreme blowjob.
3. The action of giving a blowjob for an extended period of time, as though you're trying to suck the life out of a man.
Ugh, I feel so tired, that mandrain sucked me dry.

Wow! I got totally mandrained last night.

I was maindraining this guy, he totally fainted when I finished.
by KIDONKULOUS October 19, 2008
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