Sound

n.

Heard in Galway, Kilkenny, Dublin, Sligo, Westmeath, Limerick, Louth and Roscommon

A decent, reliable person. Also used to express thanks.

In use

Ah hes sound" "Sound for the bike" "Your man is sound

Posh English

Ah, he is a thoroughly decent sort. Much obliged for the bicycle.

Same phrase, other counties