not actually a typo of "legit", unlike other definitions you see here.

means not just to be clean, but clean and CLASSY.

to be clean. as in of criminal activities or doing drugs, etc

to go straight

When your friend nails a sweet scooter trick, it is called legitness

a shortened form of the word "legitimate". however, this term is nowhere near the real meaning of "legitimate", since it is commonly used to describe things as cool or extremely awesome.

Short for "legitimate". NOT short for "legitimately" which is a totally different word. The difference is roughly the same as between "good" and "well" – in case you cared. An extremely popular yet badly understood filler word.

When something is so legit (real, authentic) that the only word that could possibly describe it is "legitness".