sociofraudus

Coined by Plautus, from socius (“friend”) +‎ fraudō (“to cheat”).

sociofraudus m (genitive sociofraudī); second declension

1. (hapax legomenon, humorous, derogatory) friend-deceiver
   • c. 191 BCE, Plautus, Pseudolus 1.3.lines 362:

     Ps. Sociofraude. Bal. Sunt mea istaec.

     Ps. Cheater of your friends! Bal. That's in my way.

Second-declension noun.

• “sociofraudus”, in Charlton T. Lewis and Charles Short (1879) A Latin Dictionary, Oxford: Clarendon Press
• sociofraudus in Gaffiot, Félix (1934) Dictionnaire illustré latin-français, Hachette.