That's a shame, but, unfortunately, I know what you mean. All too well.
In campaign the that just ended we had a gnome Sorcerer named Sweppes Gingerale, and the deepest background the character had was... well, was his name.
The player makes me grind my teeth whenever we play and I try to be serious and he treats the whole thing as a big joke and nothing but an excuse to do stupid things and make stupid jokes that would seem childish to 3rd graders.
So, while I have know the name of my character's childhood sweetheart, he doesn't even have names for his character's friggin' parents. And it's gotten to the point that HIS style is catching on with the DM, and when I get a chance to reveal background details about my character, I get funny looks from everyone else.
It's almost enough to make me look for another group to game with, if I hadn't been playing with everyone else in the group for 15 years and they weren't good friends (or at least used to be... )... and the fact that there AREN'T any other groups anywhere around here.
I just want a game that's mostly serious. Jokes from time to time are fine, especially funny jokes, and not the scatological juvenile potty humor that everything ends up turning into, but too often it just ends up with idiotic things like his cohort named El Anus.
God, it makes me nauseas sometimes.
Sorry, after the idiocy of our last game session (and our last 3E game, to boot) I just needed to let off a little steam
That's why I plan on making the Fighter +Warlord, to take command of the party, and if he pulls that kind of crap again and give his character a ridiculous name, I'll tell him that his parents obviously hated him and from now on his name is "Stupid"
I know, I know, everyone's style of play is just as valid as everyone elses, and I should be tolerant of how he wants to play, blah blah blah, but things have gotten ridiculous when you have a character named Schweppes Gingerale with a cohort name El Anus, and the guy keeps talking about the pain in his anus, or how he keeps his equipment in his anus, ad nauseaum. And then the guy makes remarks about how I'M weird because I have a serious character with background details that I've written stories about.