Top Definition
When you pretend to teabag a girl and then shit in their mouth instead.
I just Sibonered you, BITCH.
wowwwwww
what a fag!
by Dick Fitsnuggly October 25, 2007
Expressing the act of an erection in a German Like Accent
"Look at SiBoner on that guy!"
by Anonymous October 22, 2003

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