A redbull loaded with vodka and drank in the same style as shotgunning a beer. The term is native to Florida State University. Pronounced "why bomb" but the meaning is unknown.
Hey bro I just took like 3 Ybombs in a row

Lets do a Ybomb
by Fuckinbombz November 17, 2013
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A can of redbull loaded with Vodka and shotgunned like you would a beer. Invented at a bar called Yianni's in Tallahassee, FL. The favorite drink of the FSU seminoles.
Don't be a bitch, we're taking YBombs.
by LDN1851 July 17, 2015
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