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1.) To leap on top of a human being in the sitting position and rub one's testicles slowly across the scalp while simultaneously and repeatedly screaming "SLOOOOOOOWEEEEEE" in an extremely high pitched voice.

2.) The opposite of a quickie
DAMMIT!!! One time at camp that kid jumped on top of me and gave me a slowie!!
by IEatBadgers June 12, 2003
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3
a person who is slow, a blond, someone who never gets a joke or any thing for that matter, unless explained numerous amouts of times.
smart person: knock knock
slowie: umm whos there?
smart: whyyoucryin
slowie: whyyoucryin who?
smart: no really why you cryin?
slowie: uhhhh i dont get it
smart: uggg slowie!
by Erin silva May 12, 2004
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