Top Definition
Someone who can't do to sleep without whacking off first.
Adam: "Why are you going home so early, it's only 5pm."

Tyler: "C'mon man, I need to jack off for at least 4 hours or I'll never get to sleep."

Adam: "Oh dear, your an Insomniwhack... you really need to find yourself a fucktoy don't you!
by Jarrod, Adamn and Kellyum September 17, 2013

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