Much like post whore, only that it sounds like a person who prostitutes on message boards, rather than one who floods and rapes threads.
The post slut's signature had her phone number in it.
by Bastardized Bottomburp October 03, 2003
One who had out grown there slutty ways.
'Matt's in a new post-slut phase'
by RoxyStarr July 16, 2005
A woman or in a few cases men who have sex for post cereal.
"Anna is a post slut."
by PizzimpMcBozule February 17, 2003