rough as old dogs tits
when someone looks worse for wear, rough looking, usually older women trying to look younger than they are.
Look at that old woman dressed like a teenager, she looks as rough as old dogs tits!
as rough as old dog's tits
means its old rough and not pleasant to look at/ feel
That old lady wearing a mini skirt looks as rough as old dog's tits.
or
After 20 tequila shots I feel as rough as old dog's tits.
or
After 20 tequila shots I feel as rough as old dog's tits.