Someone who has too much underwear or butt crack showing. It can either be on purpose or on accident.
When my boyfriend sleeps, he is such a Mr. McFlashy Pants.
I am such a McFlashy Pants when I wear these hips huggers.
I am such a McFlashy Pants when I wear these hips huggers.
by Miss Tappz March 9, 2010
Get the McFlashy Pantsmug.