Old tits

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 "