A situation in which one member of some sort of instant-messaging chat repeatedly types and sends the word "sex" to other member. This is often used to interrupt a long speech or an opener for the beginning of an IM chat session. Sex spam is also a way to flash epeen, by seeing how fast you can send the word "sex" without copying and pasting the word.
Dude, my friend is so fast with his sex spam.
by Blurn August 12, 2008