It's only funny if people get it

I was in a bar the other day--no really--with two friends of different demographical backgrounds. We were talking to this young sexy chick and for some reason the topic of conversation was vegetarianism; the blonde asked naively, 'what do you call a vegetarian who eats chicken?'

'I know this one!' I thought. Quick as a flash my lips were moving and the words tumbled out:

'A hypocrite!'

No-one got it.

'Isn't it a vegan?' She said.

Oh, for fuck's sake...