Sup

n.

Heard in Offaly, Mayo, Galway, Donegal, Wexford and Sligo

A modest or small portion of a liquid, typically added to a drink like tea or coffee.

In use

D'ya want a sup a milk in your tay, or are you taking it black like a true savage?

Posh English

Would you care for a small drop of milk in your tea, or do you prefer it black like a true barbarian?

Same phrase, other counties