adj. too close for comfort, generally to the face
I'll wear dat ass like an oxygen mask.
by don nalgotas August 15, 2005
the act of doing 69 while the guy is on top, thus causing the scrotum sac to cover the mouth and nose like an oxygen mask
I was with a girl last night and i gave her the oxygen mask so long she was fighting to push me off of her.
by ssgtski October 29, 2009