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A bung onion is when a girl farts while a guy is eating her out. The wafts cause the guy's eyes to water.
Eating out my bitch was great until she surprised me with a bung onion, at which point my tears glistened her snatch.
by Erin McDermott May 26, 2006

Words related to bung onion

bung bungonion cunnilingus fart oral sex