Tosani
It is a feeling, work or expression. It basically expresses tremendous joy or savage work. But it's use is pretty flexible and can be used in different ways in different sentences
Today i tosanied at the school., "Aaj naba(a female) k tossiye dilam" (bengali use case), Don't or else I'll tosani.
Tosani
Total bad ass. He's really good.
Dude don't mess with Tosani he rocks