Had a HS English teacher who when catching someone chewing gum would make them open the window and throw it out on the lawn. He would say "Go feed the snowbirds" (seagulls).
The same teacher had a few more good ones. He taught a senior elective on mythology. He said we were covering Greek, Roman , Norse, Egyptian, and Polish (yes they had gods before becoming Catholic). A girl (with a Polish name)started laughing and he said. "Want to hear a Polish myth?- You graduating."