Dead on

exp.

Heard in Down, Antrim and Galway

1. very likeable. 2. used to express agreement (although frequently used sarcastically).

In use

He's dead on, so what if he sells a few drugs on the side?" "He was sayin' he pulled a model and I was like, aye, dead on!

Posh English

He is thoroughly amiable, so what if he conducts a little illicit enterprise on the side?

Same phrase, other counties