A term used to reference cannabis/marijuana/weed.

Can be used to describe a favor done for someone.

Used to describe something or someone as being superior, or excellent.

So superior that it is incapable of being changed from its level of 'greatness', hence "solid"

Like a solid foundation, what is being described as "solid" is so excellent that it cannot be made less awesome.

A state of being 'okay' or chill.

something you might say in confirmation, or congratulations to someone who either did something tight, or when you are on the same wavelength.

cool, awesome