Top Definition
When someone wears a button down shirt tucked in and they forget to do the last button, thus revealing a triangular shape of skin showing off his/her happy trail.
Man 1: Hey look Daves triangletrail is out again

Man 2: Ew, I swear he could briad all that hair if he really tried.
by sillimilli5 March 19, 2011
Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.