Because all Irishmen/women are alcoholics, their breath must always smell of whiskey in order to be "fresh".

Therefore, an Irish Breath Mint is taken after a meal and consists of two shots of Irish whiskey in order to freshen the breath.
Patrick: Yummmm, that was a really good dinnner! Lots of potatos!
McDrunk: Eew man, your breath smells! Have an Irish Breath Mint!

*Patrick takes to shots of Jameson whiskey*
by Waldo Black August 23, 2014
Get the Irish Breath Mint mug.