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A sexual act almost equivalent to the oral sex act "the blowjob", except for the fact that the person performing the fellatio make a sucking noise, such as a vacuum cleaner would make. Sounds include: "Shhlck", "Slllllluuuuuuupp" , etc.
Fred: Yo man, Daphne and I had the best sex last night!

Shaggy: Like, did she give you a blowjob man?

Fred: Dude, she gave me a freaking reverse vacuum cleaner!

Shaggy: Zoinks! That's like, totally awesome man!
by The Matress Giant December 12, 2011
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