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The act of jousting, with your genitals. Often uses gratuitous thrusting and may cause large red blotches to appear under armpits and breasts. The balls NEVER touch. Often used as a party game for peoples 18th and 21st birthdays.
Tim: Hey jacob, whatre you doing for your 18th?

Jacob: im going throusting

Tim: dude... gay

Jacob: the balls dont touch.

by derosgt June 11, 2011
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