A sock or towel used in jacking off to eliminate hand to penis contact. Normally found in bunks in jail cells, boy scout camps, and tour bus bunks. They should always be handled with gloves or a stick due to the nature of the goo they normally contain.
by twistednick December 28, 2009
Get the fi-fi bag mug.A plastic baggy containing a piece of raw liver or jello used for sexual self gratification. origin: prison slang
by George Bourdieu April 22, 2003
Get the fifi bag mug.by Brandon June 23, 2004
Get the fifi bag mug.