Didn't post anything today so to stop the comm feeling dead, have this i guess
A few additional ones. I'll list them in the nominative and then vocative (vocative makes more sense for insults).
- fungus putridus / funge putride - rotten mushroom. Something/someone worthless. Attested in Plautus.
- merda / merda - another word for shit. This one is still understood and used by Romance speakers, and depending on the language it's pronounced almost the same, [mɛɾ.dɐ], so discretion is advised. You can also use it to refer to something that is crap, Martial did this for example.
- lupa / lupa - she-wolf; slang for prostitute.
- filius lupae / filī lupae - son of a she-wolf/bitch.
- uerpus / uerpe - of a penis, showing the glans. When used as a noun it typically refers to either someone who's shameless / a horny dog or circumcised.
- stultus / stulte - dumb
- asinus / asine - donkey
- scelus / scelus - wicked, heinous
- luteus - [you're] filthy. In 2025 that doesn't seem like a big deal but you'd get yourself killed in Roman times for that.
- Iuppiter te perdat! - may Jupiter destroy you. Roughly "get damned".