Old MacDonald had a form: e_i /\ e_i = 0
Probabelistic: characterising one who supports the formation of a sovereign Iraqi state.
Babelian: when you mix up your words, but everyone still understands what you mean.
What do you call someone that's hooked on maths? A p-adic! (The most common street name for methamphetamines in New Zealand is "P".)
What shape of pasta takes the least time to eat? Brachistochroni!
Curry-Howard isomorphism:

You might be a mathematician if you think fog is a composition.
The Yoda embedding, contravariant it is.