Something that you call someone who is NOT fat. You want to make fun of them, but you do not actually want to insult them. You don't want them to take it to heart so you call a very skinny person a fatty fatty boomba latty, as a joke. It can also be used as just a nickname. It is not recommended, however, to be said to any female, large or not, as even the thinnest of girls are extremely self conscious about there weight.
Guy 1: hey did you walk your dog today?
Guy 2: yeah I ran out of disposable bags so I just let him drop a mean beef patty fatty latty in my mouth
Guy 1: damn bro that’s litty…….I’m moist
When you cum inside a girl and then she queefs in your mouth, creating a light, frothy foam of similar consistency to the whipped cream on top of a latte