What does serás… mean?
Expression
you absolute… — the insult you don't need to finish
Serás plus an insult — serás capullo, serás cabrón — is an affectionate telling-off, not an offence. The formula is so fixed that it can be left half-said: the other person knows exactly what was coming, and leaving it out is funnier than saying it.
—Lo estabas pensando. —Un poquito. —Serás…
