beat off

/B IY1 T AO0 F/
verb
  1. 1

    To drive something away with blows or military force. Now often used figuratively.

  2. 2

    To masturbate, usually a man of himself.

  3. 3

    To waste time.

    โ€œI beat off at work all day; I didn't get anything done.โ€

Source: https://en.wiktionary.org/wiki/beat%20off