Just to help out here since the rule that seems to apply here is "anything that may be considered offensive" (TBD by who, I have no idea) I've had memes deleted for containing:
A really fat guy with no shirt
Jan and Peter Brady playing beer pong with "TGIF" as the caption
Funny memes containing the word lesb**n
Funny memes containing the word 'guns'
Memes with a sexy girl doing something like leaning over an engine bay---fully clothed, no profanity
So watch it folks, keep it "G rated" as a mod once said...real fun huh.