My mother rarely said swear words, but she often used first-letter abbreviations like, "SOB", for "Son of a bitch", in their place. As kids, we knew we'd get in trouble for even using such abbreviations, but we were pretty smart little brats so we worked out a "system". Since "SOB" spelled the word "sob" which was pronounced just like the automobile brand "Saab", we called each other "Swedish automobiles". Mom also said "SA" for "shitass", and "SA" sounded just like "essay", so we called each other "writing assignments".