A paper bag that you take into a bathroom stall and have a person stand in while you are raping them so that when people walk by, they don't see the victim's feet.
I took Courtney to Red Lobster where I put her in a lad bag and made her scream.
"I'm telling on you!" (typical lawbag response to anything)
Lawbags usually introduce themselves as "I'm in law school," before they actually say their names. They always make it a point to make it known they are in the "upper echelon" of society's educational hierarchy.
A signature style of lawbags are their Know-it-all-matter-of-fact debate structure. Lawbags like to argue over the minutest points, in hopes he can impress his audience with his quasi-ability to interject old latin phrases such as "quid quo pro" into laymen conversation.
Lawbags are smarter than you are and they are unabashed to inform you so.