To have an erection.
He boinged at the sight of the girl on girl action that was 89.com.
by Turtle October 22, 2003
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(N.) The image or sound effect of something exciting.
Hey, I just saw this really tall chick with big boobies. Boing!
by G-Union May 12, 2003
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The action of an erect penis springing out and up, when the underwear is pulled down past it.
"After rolling around on the bed for awhile, I went to pull off his jockeys in order to blow him, and he totally went boing."
by Boingyest March 10, 2013
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sound effect of a spring contracting/extending
*boing* boy: wow that was a spring.

*byorng* other boy: wow that was a swedish spring
by Hamburher April 19, 2020
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inj. what one says to indicate something awesome, or something sexually arousing
"Boing!"
"What's up, Ron?"
"I just saw a chick with like, size F tits!"
by Reese May 09, 2003
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a word used when one is bored, or a name for someone who has no life.
EXAMPLE 1

amy: i have nothing to do..
jessica: dude seriously..boing

EXAMPLE 2:

kayla: why are you reading? we're at a dance for heavens sake..

milly: its fun!

kayla:...god youre such a boing..
by sillyyyme February 19, 2009
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