Pocket known

Its a simpler way to say that you know an area as well as the inside of your pocket.

Can I help you to explain where you should go? You know, Im pocket known in this area.

by just me, very small July 1, 2009

back-pocket knowledge

Knowledge that one knows but only brings up when the situation presents itself.

Johnny knew he wouldn't need to know that in english, "mis bolas son picazón",means "my balls are itchy", but he remembered it just for the sake of back-pocket knowledge.

by Dat Dude 1. July 7, 2011