A sex act in which Guinness beer and Jamison Whiskey are funneled into the asshole on the cusp of ejaculation. The ejaculatory penis is then inserted creating the ultimate Irish Car Bomb
Jack: " Last night I have her the good old Irish Insertion. It was a hell of a headrush for us both!"
by howdyhuman August 12, 2021
Get the Irish Insertionmug.