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More than a blowjob; it's when a girl actually hums (thus vibrating her lips) when her mouth has encased your engorged penis or balls.
by John E. November 12, 2002
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Nov 27 Word of the Day
A stupid person; it refers to the lack of surface area on an individual's brain. The general thought is that the more surface area (wrinkles, creases, etc.) a brain has, the smarter the person is. Conversely, a person with a smooth brain (no wrinkles) has less surface area and would therefore be stupid.
That fucking smooth brain put his shirt on backwards again...

That smooth brain is dumber than a pile of shit.
by Tip Tank May 14, 2011
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2
1. Even better than a blowjob, it's when the person actually hums/vibrates their lips while their mouth is around your cock.
2. One of the least fuel efficient vehicles on the Earth.
I rode home in a Hummer while recieving a hummer.
by Cummy worm August 21, 2010
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A hilarious name for oral sex. Often used as a joke, when people think the Hummer H series vehicles.
Son: Daddy, I want a hummer for christmas.

Dad: (laughing) Me too, son. Me too.
by Armthehobos September 12, 2007
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A blow job which incorporates a gentle humming while performing the duty to increase stimulation.
My husband asked me to give his boss a hummer to thank him for giving him a promotion.
by Belinda November 05, 2004
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5
1. A civilan version of the military vechicle Humvee. Hummer's are produce by the General Motors Company. Currently there are two version's H2 and H1.
2. A Blowjob when the girl hums during the BJ
by RobT September 20, 2003
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No, not the SUV, an extremely pleasureable type of oral sex which involves the female humming to create a vibrating sensation in the penis during oral sex.
by Hubs June 20, 2003
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