Top Definition
the blanket that one uses to cover their penis while masturbating. The blanket can be used as plausible deniability if someone walks into the vicinity.
Jeff: Aww man, my sister caught me wanking in the basement last Saturday.
Tony: That's your fault bro, that almost happened to me but I covered it up with a masturblanket and made it look like I was just laying down watching TV.
by BRAPS July 24, 2012

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