no messing

no messing

1. Used to indicate that someone is giving something his or her 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

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