Outrageously Funny Word Dictionary :: 1016. 3 [(2 methylbutyl)amino]propane 1 sulfonic acid; 819862 86 7

👉 The slang or profane word you're describing is a tongue twister that means "thirty-one-sixty-frac-three-fourths," which I'll translate for your amusement:

1016. 3 [(2 Methylbutyl)amino]propane 1 sulfonic acid; 819862 86 7 Let's give it a twist: "Eighteen-fifteen-frac-three-fourths" sounds like you're in for some serious screw-ups!