Nitty

[Donald Trump]

a nitty is someone who people sell drugs to

[Julian]

Some one worse than a tramp/hobo, looks like one too, lower than low!, theyre snakey (2faced, even towards there mates, if they have any!) and kats for drugs (crets/will do anything to get hold of some, they need it as much as they need oxygen.)

[Sonia]

An [idiot] or a [dickhead], someone who thinks theyre [cool].

[Tanya Shivari]

Ewan smith

[Kit]

Someone who over uses drugs

[Sommer]

[Nitty] has a few different meanings, one being somebody who focuses [on the small] negative aspects of something instead of seeing [the big picture]. Basically [nitty] is used to describe a nitpicker. Also see nit.
Nitty is also often used to describe somebody who is tight with their money, or somebody who you can never please.
The term is popular in the poker community to describe somebody who is tight and plays only very strong hands, and now the poker community has expanded the use of the world to capture life nittiness too.

[Sarah]

-from [nit]. To be [nasty].

[Sommer]

[Originally], slang for headlice in a [hat]...
Nitty can now mean [pretty much] anything you like :)

[Agnes]

[Nickname] for the [name] [Anita]