Three way sexual intecourse involving two male participants and one female participant.

Bilman can often be regarded as a social faux pas, in cases where the girl involved is unattractive.

Bilman is the root word for other phrases such as:

Inverse/Reverse Bilman - three way sexual intercourse involving two girls and one guy.

Inverse/Reverse Bilman always earns the male participant maximum lad points.
Lets have a bilman tonight.
by b.o.w.w. April 25, 2011

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