an act of sexual passion in which one of the persons involved is so overwhelmed with the urge to makeout/hookup/have sex with the other person that he or she loses contol, taking passionate, almost aggressive, charge and intensely makes out with them. this act may involve pushing someone against the wall on onto a bed and may also include grabbing of the face and hair.
"oh man, last night that guy at the bar had mad throwdown. he saw me, walked to me from across the room, pushed me against the wall and started intensely making out with me. i couldn't wait any longer so we went to his car and had the hottest sex!"