Pentabanged 

Having had sexual intercourse involving 5 persons.

I got super drunk yesterday, the last thing I can remember is getting pentabanged in the bathroom of the bar.

Pentabanged by catpoop6 December 17, 2010

Pentabangular 

See Tribangular. It's like that, only with five. Other variations include Hexabangular, Septobangular, Octobangular, Dekabangular, and Dodekabangular (6,7,8,10,12).

See example for Tribangular, but replace with Pentabangular or whichever word you need.

Pentabangular by Vipper January 17, 2008