very frustrated with telling people what I do

[kewl_cph]

Dude, the universal reply to girls asking you what you do is telling them that you're Brad Pitt's ass double.

Her: So what do you do?
You: I'm Brad Pitt's ass double.
Her: Oh, really?
You: Yeah, it's boring job, but he won't use anybody else.

From there you just run with it. Make her feel your bum if she's not convinced.