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1.
When a guy and girl are dancing. The girl's front is facing the guy's, and the guy's front is facing the girl's. They are interlocked (one of the guys legs is in between the girl's leg, and one of the girl's legs is in between guy's). Then, they usually sway side to side.
Wow. Me and my boyfriend were Front Grinding at the dance. It was great.
by christiankicks616 May 18, 2009
 
2.
the same as regular grinding but when both grinders are facing eachother. can occur in a sandwhich with a girl in the middle and one guy in front of her and one guy behind her.
i was front grinding with this guy at a party and i swear i felt him get a boner
by JAM_LIFE October 29, 2007