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Music played in old porno films right after the first penetration or little bit before a blow job by the bass guitar and also used to describe someone that is very hot.
bitch you look Boom Chicka wah wah !!!! tonight
by Edgar Banuelos November 16, 2007
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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
A phrase from the Lynx advert
Usually used by girls to describe a guy's hotness
or by men to describe a girl's hotness.
sometimes accompanied with a dance
Girl: Woah! Look at that fitty! BOOM-CHICKA-WAH-WAH!!
*sways hips*

Guy: hmmmm... oo-er!
by sazzles May 26, 2007
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3
A sexual practice, one partner takes a shit on the others stomach (Boom) the male partner then slaps the penis in the shit (Chicka) before proceeding to rub the penis under their partners nose (Wah Wah)
I had to shower after my ex-boyfriend decided to Boom Chicka Wah Wah
by Kim Mitten March 24, 2007
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