Top Definition
When you having sex with a girl and pull out too far then miss and bend you penis
Me: Yo Fabs I was banging this bird then ended up T-boning he
Fabs: mate that must have been well painful
by Posh Twat September 22, 2015
When one man rams his penis into the penis of another man at a 90-degree angle.
Jeff and I got really hot last night. We were totally t-boning by the fire.
by whcgonzo November 08, 2011

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