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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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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The motion that a penis makes while becoming erection quickly.
I told John that i'd like to give him a blow job , and he went Boing Boing Boing.
by SexyAndIKnowIt6979 March 04, 2012
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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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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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