When one of your friends doesn't want to go party with you or is too tired to go out. Pretty much being a pansy and trying to be sober or go to bed early.
Cool Friend ; "Hey man I got these two chicks that can party all night and will let us sniff coke out of their assholes"
You; " nah man I can't , kids got school in the morning"
Cool Friend; "Ahh! I knew you were gonna pussy out you old tits "
What the johns used to call this gal that ran tricks on Franklin back in the day. They called her this because her tits reeked, mainly due to the fact that her diet consisted mainly of onions and sour milk at that time, but also due to bad hygiene habits in general.
A girl that gets sloppy drunk and sucks any dick in sight. Old slop tits is also known to slap a friend or opponent with her sloppy tits, leaving a bruise on the side of onesface or boner.
Old slop tits is here again, cover your boners and don't make her angry.