bout 40

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 Meh

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