While your
having sex, you slip a cigar into your partner's ass, and then when you are all
finished with your session, you light the cigar up and smoke it.
You give someone the Castro.
You can also get Castroed.
see also
the Chong
Guy 1: While I was fucking my girl
last night, I
noticed a cigar
on the night stand so I gave her the Castro.
Guy 2: you gave her the ole Castro? That's fucking tight!