adjective/ˈtwanis/
of excellent quality; of a nice nature (said of a thing); of a good, kind personality (said of a person); Cool (fashionable); Nice, agreeable, giving a general sense of well-being, cool
“Me pasó algo tuanis.” — Something nice happened to me.
Synonyms: bacán, bacano, bárbaro, buena onda, chachi, chachi pistachi, chulo, chido
Originally the plural of the malespín form of bueno.