Used in two different ways, one way is to show that you have lost interest into something and wish to do something else.
Also used in a way to show defense against someone who mocks you
(Example 1)
Me: Man, this party is straight farm to nug bro, let's grill this cheese
Friend: Ight bro, this place is boring
(Example 2)
Yo i'm really bout to grill this cheese right now if he don't stop talking that bull