Pronounced: Best-ee-yole. Bestiole means to be cool, being the best. The word can also be used as an adjective. The word comes the french rapper from france Fatal Bazooka. The word is in fact french, but lately on Teamspeak servers, people by the names Vital and Fato(rip off of Fatal Bazooka and Vito)have spam teamspeak servers with words from Fatal Bazooka, the word has been starting to be used by americans, and has now been adapted to the english and internet language but the American pronounce it Besty-yall, the word is slowly growing on the internet, in conclusion Bestiole is a word from Fatal Bazooka music video, that was then adapted by Vital and Fato which was then use as an everyday leet word.
Vital: Bra, you see that kill? Man, I am too bestiole.
Fato: Yeah, dawg, they didn't that coming. We are too bestiole!
Adjective Example: This bestiole kid! Meaning this kid is the best.