sexxy, hot, cool, and can also be used when talking about a heavy situation

The original hefty consists of 6 oz tequila and 3 oz sprite, all into a rocks glass, no ice, then you down the entire drink in one breathe. Wait 10 min and it hits you HARD
You can make a hefty out of any alcohol, just use the same 2 to 1 ratio of alcohol and soda.

The New Cool means the same exact thing but cool is getting old

(noun)

describing a person of Chilean descent, who posses one or all of the following qualities:

1: little or no sexual appeal
2: insignificant social status
3: humourless

"Heavy," as in serious.

from the movie Black Girl (1972)