Give the teacher a funny nickname. ..

Mediterranean (bald) poodle (universal) sells egg rolls (universal)

Mushroom head (hair is as common as mushrooms)

Campus flower (selling tofu flowers at the school gate, GM) Shen Ni (female)

Dumb duck (mute, shouting, spitting, alias: watering can dumb duck, suitable for social teachers)

Dutch pig (fierce and fat)

Fertilizer (chemistry teacher, fat)

Watermelon is too wolf (watermelon head, also flirting)