Being bored together

To chill, relax, or have a good time.
A code word for "making out"

To have casual sex, usually implying with someone on the regular.

Having sex with the opposite sex and hanging out a little bit!

Derives from military slang; the term hanging out usually refers to a state of tiredness and exhaustation, after instence physical activity. Some times basic training is usually refered as a major hang out due to the intense nature of it.

the act of getting high, lifted, or just plain fucked up.

usually referred to chillen wit ones friends but also can be used as code in front of ones parents to mean "lets get messed up tonight"