After a reasonable amount of intercourse, the penis is removed from the vagina and slapped across the female's mouth, leaving residual sexual fluids, both male and female. The result is a kind of greasy mouth, comparable to if someone were to slap bacon on their lips.
by Goodlum December 6, 2010
The roughest toughest penis to ever grace the fields of Madagascar. People dropped in fear at the site of the Horizontal Bacon Smile drinking tea or knitting mugs to drink from. He was one bad ass light-skinned lincoln log
by Miles Labia December 15, 2003
Another term for a vagina, based on one's resemblance to two pieces of bacon arranged as to form a shape representative of a smile (turned sideways, no less.)
by The Womb Ferret July 26, 2006