tur·pi·tude /ˈtɜrpɪˌtud, -ˌtyud/
1. vile, shameful, or base character; depravity.
2. a vile or depraved act.
1480–90; < L turpitūdō, equiv. to turpi ( s ) base, vile + –tūdō -tude
1. wickedness, vice, vileness, wrongdoing.
“I propose that such loquacity passes beyond the scope of nuisance and over the verge of turpitude.”
Source: Tales of the Dying Earth by Jack Vance.