mob up

mob up (third-person singular simple present mobs up, present participle mobbing up, simple past and past participle mobbed up) (informal)

1. (intransitive) To form a mob (i.e. a large group).
2. (intransitive) To join, ally with or be beholden to the Mafia.
3. (transitive, rare) To gang up on.
   • 1991 September, Stephen Fry, chapter 1, in The Liar, London: Heinemann, →ISBN, section I, page 18:

     Gooderson tells me you were not unadjacent to mobbing up R.B.-J. and Sargent in the changing-rooms, Healey.

   • 2002 March 8, Demothios, “How will it all end?”, in alt.religion.islam‎^[1] (Usenet), archived from the original on 26 March 2026:

     Islam is no different from other religions. You all should stop treating it as if your^[sic] nazis mobbing up a Jewish crowd.

   • 2005 September 23, BombayMix, “Guild Wars: What's up with the loot rules?”, in comp.sys.ibm.pc.games.rpg‎^[2] (Usenet), archived from the original on 26 March 2026:

     In PvP I hardly ever attack, only when we've nearly won and are mobbing up the last few people.

   • 2009 May 4, Trish Brown, “Finish Happy Dance!!”, in alt.beenz‎^[3] (Usenet), archived from the original on 26 March 2026:

     The other day, I heard the birds outside going ballistic and rushed out just in time to see three pee-wees, a magpie and a flock of noisy miners mobbing up a *goshawk* as it flew just above the houses!