no messing

no messing

1. Used to indicate that one is giving something their full attention. Primarily heard in UK. A: "Wow, you're really going to eat that entire pizza by yourself?" B: "Yeah, mate, no messing!"
2. Stop misbehaving or fooling around. Primarily heard in Ireland. OK, Liam, no messing! Eat up your lunch and stop playing with your food.
See also: mess, no
Farlex Dictionary of Idioms.

ˌno ˈmessing

(informal) used to show that you are telling the truth, or to ask somebody if they are telling the truth: That’s the honest truth! No messing! Are you sure? No messing?
See also: mess, no
Farlex Partner Idioms Dictionary
See also:
  • be well away
  • beat (one) hollow
  • beat hollow
  • beat somebody/something hollow
  • beat someone hollow
  • be the dead spit of (someone)
  • be the spit of
  • be the spit of (one)
  • (you) coulda fooled me
  • (you) could have fooled me