snowballing

/S N OW1 B AO0 L IH0 NG/
verb
  1. 1

    To rapidly grow out of proportion or control.

    โ€œThe high unemployment rates quickly snowballed into a major budget problem for the government.โ€

  2. 2

    To play at throwing snowballs.

  3. 3

    To pelt with snowballs; to throw snowballs at.

  4. 4

    (sexual slang) To receive a man's ejaculate in one's mouth, and then to pass it back and forth between one's mouth and his.

Source: https://en.wiktionary.org/wiki/snowball, https://en.wiktionary.org/wiki/snowballing