A victory clasp is a double hand gesture

Gesture

A gesture is a form of non-verbal communication in which visible bodily actions communicate particular messages, either in place of speech or together and in parallel with spoken words. Gestures include movement of the hands, face, or other parts of the body...

 used in celebration of one's own victory

Victory

Victory is successful conclusion of a fight or competition..Victory may refer to:**strategic victory**tactical victory** Pyrrhic victory, a victory at heavy cost to the victorious party**Victory columns**Victory Monuments**Victory personified...

. Both hands are clasped together and shaken side to side for as long as the victory merits. The origins of this gesture are generally unknown, however it is thought to have been derived from an ancient Hawaiian greeting.

This gesture is now sometimes employed in an ironic or self-deprecating manner.