The act of poking a female's butthole with your nose while eating her out from behind.
"Tom is great at oral, but it was kinda weird when he was pigeonholing me."
by jdubs312 November 11, 2014
the act of putting a pigeon(or similar small bird)'s body inside your anus, so that all is visible is the head.
Bill Oddie has been caught pigeon holing on the set of springwatch again!
by le beed November 30, 2009