Boss: Can I do a reference check?
Me: I don’t have a...
*sensei appears*
Me: oh no
Sensei: He was a good student, but he lacked kizma.
Boss: What's kiz...
Sensei:😈
Me: Oh no, here we go.
Sensei: Kizma AS-
Boss: Can I do a reference check?
Me: I don’t have a...
*sensei appears*
Me: oh no
Sensei: He was a good student, but he lacked kizma.
Boss: What's kiz...
Sensei:😈
Me: Oh no, here we go.
Sensei: Kizma AS-
Alright listen up, buttercup. The joke is that the sensei is about to say "kiss my ass" but replaces "ass" with a funny sound AS- cause he's so cool. The joke plays on the expectation of a crass retort, but delivers it in a silly way. I bet you still don't get it, you are the kind of person that laughs at their own farts.