A method of masturbation whereby the masturbator uses a traditional one-hand grip on the penis, while inserting the thumb from his other hand up his anus. Due to the slightly uncomfortable positioning, this practice can mean the participant takes a "long"time to complete the wank to satisfaction.

This method was apparently first seen performed in Scotland and in recognition of this, the Scottish word for Long, "Lang" is used.

(noun) A successful type of theft which results in an acceptable, impressive and rewarding payday for the protagonist.