When a guy sticks his head in a picture he's not welcome in or the people who are in the picture are unaware of him.
While looking at a photo of a group friends..
"Dude, who is that bonus boy in the back?"
by snotragpoopface October 2, 2009
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A trans man. Bonus hole refers to the front hole of a trans man - not the butthole - that can also be used for penitration during intercourse.
His profile says he is a bonus hole boy.
by ludante October 12, 2023
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