A perversion of the children noise of a chicken, cock a doodle doo. Cock is itself a slang word meaning penis. Thus Jack would be an action to the penis as to Jack Off. Doodle is a slang for sex. Thus meaning a action of sexual pleasure with out intercourse. To Jack off is done alone. Jack a Doodle Doo would be done by two persons to obtain sexual pleasure. The analogy of going to 3rd base.
by llcalejr May 14, 2019