Irish whisky?
Easy to make. Just spend three weeks drinking nothing but cheap bourbon and dominos pizza. S*it your diarrhea s*it into a metal bucket you leave in the sun. Pour in used motor oil and weed killer on regular occasion and liberal amounts. Set on fire occasionally. Pour the mess down the toilet in a mexican hotel and used said bucket to recover the mass 4 blocks down the street. Do this several times for aging.
There you go. Irish Whisky.