Bona Dea 

(Pronounced "Bonna Dayuh")

When you fuck your cousin's girlfriend/wife.
This term can have a particularly special or stronger, more effective meaning if he is your close friend, and if you do so by sneaking into a girls only party she is attending.

Bart: Yo dude did you hear about Mike?
Dude: Na what happened to him?
Bart: Bro his girl got Bona Dea'd by Jasper rollercoaster style
Dude: Nah that's crazy brah 😂😂 Jasper a savage bru like na he dont play like really a player fr wtf 💀💀💀💀💀💀💀
Bart: Mike a fag anyway

Bona Dea by sebdoes September 7, 2025

Bonadea 

Was the Roman goddess of fertility and/or harvest. Woman use to pray to her for many children, women as slaves would pray for freedom and farmers were pray to her for their lands to be fertile. She was very beautiful , compassionate and kind. Translated it means Bona/good Dea/goddess The good goddess.

"Oh my beautifull goddess BonaDea please grant me the freedom to choose to marry Ontonio my true love instead of my owner's son Marius. I lay at your feet my offering of beautiful flowers and succulent fruits that your fertile lands have brought us."

Bonadea by BDM/G February 3, 2010