Alcoholic beverage served at Irish Pubs consisting of hard cider on the bottom and Guinness stout on the top. Excellent for mid-day drinking since it doesn't make your breath smell like beer, tipping off your boss that you went to the pub for a pint (or two).
Also referred to as simply 'Poor Man's'
Barkeep: A Black & Tan for you today?
Me: Not today; lemme get a Poor Man's Black Velvet.
Barkeep: Ahhh... Better for summer, eh?