Sam means "a smart person, being good at
everything related to school". It means "a
nerd". Being a Sam means "being a
nerd".
He must be Sam, because he has round glasses and he is always in the
library. (He must be a nerd, because he has round glasses and he is alsways in the library.)
You'
re being a Sam! (You'
re being a nerd!)
I'm not a Sam! (I'm not a nerd!)