Green’s Dictionary of Slang

(Irish) a measure of liquor.

1954		‘The Terrible Baisht’ in Dublin Mag. Oct–Dec. 14: If Hollyhocks saw us taking our little tint it’s a scandal he’d be making of it. He’s a holy show for remarking on women drinking .
1995		E. Kelly Apprentice 175: The men accepted a bowl of porter from a large bucket. There was a tint of wine for the ladies .