čupati

1. (of weeds, hair, teeth) to tug; to pull; to pull out; to pluck
   Baka svako jutro čupa korov u bašti. — Grandma pulls weeds in the garden every morning.
   Prestani da čupaš obrve! — Stop plucking your eyebrows!
   Nemoj da čupaš sestru za kosu! — Don't pull your sister's hair!
2. (of poultry) to pluck
   Mama je u dvorištu čupala kokošku za ručak. — Mom was plucking a chicken for lunch in the yard.
3. colloq. (čupati se) to pull each other's hair; to scuffle
   Deca su se čupala oko igračke. — The kids were pulling each other's hair over a toy.

For pulling something out once (sense 1) the perfective is iščupati; for plucking a bird completely it is očerupati.