1. Hard to understand: Difficult to understand because of not being fully or clearly expressed.

2. Indistinct: Not able to be seen or heard distinctly.

3. Unimportant or unknown: not important or well-known.

4. Known to few people: Unknown to most people, e.g. because of being hidden or remote.

5. Dim: dark, shadowy, or clouded.

A commonly used word in the dictionary of the Hipster.
Used to define something that 'you wouldn't understand' or 'probably never heard of'.

for someone to be extremely weird for what, very weird and sussy (sus)

A term used to describe something that barely anyone knows about.

Not mainstream; weird. Trying to be different; a rebel.

The kind of person nobody (in their family) misses when they're not around, even if they were somebody (and not just in a small pond) in the world.