The nether region between the balls and the anus.
Wham! Right in the binus. That HAD to hurt.
by Easy E April 10, 2003
1. n. human anatomy; the area between the genitalia and anus, or the skin covering that area; taint; gooch; baunch; perineum. Originally derived from the words "balls" and "anus," but applicable to both sexes.
That girl isn't much to look at, but she is so good at licking binus I swear I'd fucking kill for her.
by FrankRizzo730 April 02, 2009
a really mellow person, who is jealous of your fajitas.
Binu was mad when I left him for a fajita.
by binulover March 02, 2004