Go Look it Up

A conversation I had last night:

family member:  That kid is kind of swoozie.
me: Swoozie?  [pause]  What does that mean?
family member:  I don't know.  I heard someone on TV use it and it seemed appropriate.
me: So you just throw around words you don't know and thought you would try one out on me?
family member: go look it up if you want.