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1.
when one balances a woman on his back by her breasts, and thrusts forward with force. The woman is thrown forward, over her partners head and the man is likely knocked unconscious by the force of the body hitting his noggin.
After all the tharting that went on back in their room last night, Jane's tits were sore and John had a headache.

During his dry spell, Kevin was so desperate that he didnt even need sex, he would have been fine with just some good tharting.
by Maphead :P September 02, 2008