Person 1:You heard of big peepee man123?
Person 2:yea he defined pineapples Person 1:You mean pineapples?
Person 2:*wipes forehead*
Person 1: stop wipeing my forehead
big fat peepee. Ok time to analyze.
Big: Substantial in size
Fat: Plump, well filled out
PeePee: Male reproductive organ (baby making machine part 1)
Put'em together and you get a sizable well filled out male reproductive organ. Damn if you needed the urban dic for this I suggest you finish elementary school.
Also used as an insult many times adding "head" to the end.
Oh shit. I was at the stalls the other day and being the stupid gay fuck that I am I looked over at the guy next to me and I noticed that he had a big fat peepee! Man, girls would get pregnant just looking at that thing!
In an insult:
Hey what kind of big fat peepee head are you? Only a big fat peepee pushes other kids off the swings!