What is Bout 40?
1.
A length of unknown value, somewhere between 30 minutes and the end of humanity. A way of saying that you don't have any idea how long you are going to be. Describing something that went on for ages. used in the same context as
dude 1: sup, im just chillin fo bout 40, then ima head out
dude 2: chea mayne hurry the fuck up then
homie 1: im was hittin that shit fo bout 40
homie 2: yea dogg, you hit that shit foreal
See