Suggestion: do NOT use this when conversing with your Language Arts teacher, they will get very annoyed.
student: i dunno, you just write some stuff...
teacher: PRINCIPLE'S OFFICE! NOW!!!
B: Eh, stuff.
A: Do anything cool this weekend?
B: Did some stuff.
A: Buy anything?
id like some of that stuff
whoa! you see that stuff last night?
i just stepped in some stuff