come on ppl. ik u've heard some!!!!!!!!!

knock knock
whos there
you know
you know who
thats right... avada kedavra

Alright so sirius black is a student at hogwarts he goes to his class.
Professor: can someone tell me how to make a love potion
Sirius: *throws a paper ball*
Professor: Mr.Black thats ten points fom gryffendor
Surius: *laughs*
Professor: I'm serious Black
Sirius: Hey I am too!

ha thats a good one here's a yo mama one:
Yo Mama so ugly even Voldemort wont say your name

And another
Dear Sirius Black,
Whats your middle name?
Sincereley, hoping its Lee

Harry: Surely you cant be serious
Sirius: I am Sirius and dont call me Shirly

OHOH since were doing Sirius i got another one:
Harry: Youre a Werewolf?!
Lupin: Yes
Harry: Are you FUCKING SERIOUS?!!
Lupin:Yeah that too
Harry: What!?
Lupin: Never mind

Ok credit to Katekicksass

Why did Snape stand in the middle of the rode?
So you'll never know which side he's on.

Yo mommas so fat her patronus is a cake

Yo mommas so fat a boggart took one look at her and turned into a salad

Knock, knock.
Who's there?
You know.
You know who?
He's dead now, you can say his name.