"Well-well look. I already told you: I deal with the god damn customers so the engineers don't have to. I have people skills; I am good at dealing with people. Can't you understand that? What the hell is wrong with you people?"
Being consistent, personable, and kind has helped me advance more in my career than any one specific technical skill. Funny people are generally endearing, and it is usually easier and more productive to work with folks you get along with than ones you don't.
an aside, being funny in this context is where everyone gets a benefit of being happier. some types of humor is denigrating to a particular group or person and that's generally not going to take you very far in a lot of fields.
There is a fine line between being offensive and being funny. I think the funniest people go very close to that line, but maybe that's just the type of humour I appreciate. I tone my homour down a lot at work compared to when I am with good friends as there are a lot more consequences to going over the line.