Short for gangster, typically used in context to describe a person who is cool or awesome

g

Thue udb

Worst letter. H is the more superior.

The fucking letter g. Seriously? Maybe you just typed whatever and only a g came out. But are you that fucking stupid?

A person that continuously does favours helps you out with things without expecting something in return

Comes from the meme, "Iike ya cut g *SMACK*". A foreign word for "gangster" so he's just saying, "Like ya cut gangster".
Very, very graceful.