The sexual act of insterting a finger or penis into a person’s foreskin. Synonymous with docking. The French Finger Trap may also refer to the act of inserting one MAS-36 rifle into another by way of the bayonet lug. The rifles will then become semi-permanently attached tip-to-tip.
Jacque showed me how to perform a French Finger Trap last night. It was fun at first, but we were stuck together until morning.