Having an orgasm.
This massage felt so good that I almost busted an O.

Or

Brad is in the other room with Kayla; they're busting an O.
by PaperTowns September 21, 2010
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When a person, typically male, who can absolutely not resist ratchet/rancid pussy, and has to attain it at all costs.

Also Described as Busting an Omar.
Person 1: <shakes head> dude...you're Busting a Nigga O.
Person 2: Fuck it dawg, she was aight in the sak, im just a squirrel tryna get his nut.
by ELCHEEZE July 8, 2013
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