Ross Geller is a bit of the nerd of the group of Friends, but definitely a member as his sister is Monica and Chandler was his friend from college. Ross startts off as a paleontologist at the New York Museum of Natural History and later becomes a professor at NYU.
Ross is infamous for his on-and-off again relationship with Rachel, that ends with them having a kid together and mostly in the on-stage.
Of course, we can't write a bio for Ross without mentioning his three failed marriages to: lesbian Carol (who he had a kid with), Emily, and Rachel (which got annulled).
Ross: Your money's mine, Green.
Rachel: Your fly is open, Geller.
Chandler: Joey's tailor... took advantage of me.
Joey: No way, I've been going to the guy for twelve years.
Chandler: Oh come on, he said he was going to do my inseem, then he ran his hand up my leg and then there was definite...
Ross: What? (Chandler closes his eyes)
Joey: That's how they do pants! First they go up one side, they move it over, then they go up the other side then they move it back, and then they do the rear. Ross, will you tell him. Isn't that how a tailor measures pants?
Ross: Yes, yes it is... in prison!