tan 45 Share definition Flag use in place of the number 1. the tangent of 45 degrees is the equivalent of 1. Mommy Dearest: How many scoops of mashed potatoes do you want? CrackBaby: I'll have tan 45 scoops. tan 45 by pheemayl January 20, 2005 0 0 Get merch Get the tan 45 mug. Buy Now — $32.95 See more merch