bust one's balls

Meanings:

• 1.

  United StatesCanadainformalvulgarslang
  • To harass, tease, or ridicule someone persistently; to give someone a hard time in a teasing or abusive manner.

• 2.

  United Statesinformalvulgarslang
  • To pressure or strongly push someone to perform, comply, or produce results, often using blunt or aggressive language.