To soak a mans penis into a pint of guinness and then slap a womans face with said guinness soaked penis.
Person A: Where was bob last night
Person B: I heard he was giving his wife the irish thwack
Person A: My Goodness!
Person B: I heard he was giving his wife the irish thwack
Person A: My Goodness!
by Sloth50Cal March 28, 2024
Get the Irish Thwackmug.