1: Double useless, something with no point at all. Comes off of "tits on" any male mammal, since males
don't nurse the young; chickens of course
don't nurse their young at all, so
tits would be especially useless on a rooster.
2: derogatory for tiny or very small breasts
He's not even tits on a boar, at best he's tits on a
rooster.
So we had it about worked out when Tits on a Rooster finally showed up, and it all had to have his input.
She's got about the same
tits God gave a rooster.