Boing Boing means large breasts, with the term 'boing boing' referring to how large breasts bounce .

The term was popularized by Vtubers from Hololive.

See 'rushia is not pettan': youtube.com/watch?v=ahQr-bIhJoU
See `Pekora is Boing Boing`: youtube.com/watch?v=N0Aub5GcGyg
"I am not flat! I am boing boing!"

"I heard she's unhappy with not having them boing boings."
by NotXA October 09, 2020
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'fool' in the language of Spanish
(9th grade broken Spanish)Aye Caramba, porque es tu muy mucho loco bobo!?
For Crying out loud, why are you very much a crazy fool!?
by David July 02, 2005
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an idiot. Someone with severely diminished mental capacities.
He's a real bo- bo. I don't know how he got hired.
by slipsheet November 02, 2004
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A term referring to a group of man children around 21 yrs of age. This group is often characterized with debilitating immaturity fueled by excessive alcohol consumption. A circle of child hood friends that has evolved into an impressive example of co-dependency. These hotties are forever the life of the party and you can be assured you will always wake up with a hangover and some stories for the road. But, ladies beware...
"Check out that group of guys across the bar they are definitely the bos..."
by Taura and Laffiny July 05, 2009
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generic shoes, probably bought at Kmart
"Bo Bos, they make your feet feel fine.... Bo Bos, they cost a dollar ninety nine"
by Matt Vaughan October 20, 2006
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A rash you get between your legs near your balls after going swimming at the beach
I have been at the beach all day, My boing boing is killing me.
by Spinksy November 03, 2007
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