Someone so ugly that even the mere sight of their face is a method of birth control. That is, they are so physically unattractive that they will probably never have sex.
"Oh my god, did you see how ugly that guy was?"
"Yeah, what a contraception face!"
or:
"You're so ugly your face is a contraceptive!"
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.