a motion usually related to sex
where a man (or woman) push a part of there body forward and back repeatidly, usually the pelvis.
Timmy: i had Tina on my bed last night, and i couldnt help but thrust my pelvis into her.
Jimmy: just a regular thrust?
Timmy: is there any other?
Jimmy: well.. i mega thrusted her last weekend. i nearly broke her pelvic bone.