A "Klick" (correct spelling) is a military term, means 1 kilomeeter, or .62 miles.
Restroom IS a slang term. Click on the related question
No.
It is a slang term for educated.
It can be. As a slang term meaning "hyperactive" it can be either an adjective or a noun.
Just slang term meaning the most senior military & civilian leaders and/or staff at the US Department of Defense housed at the Pentagon.
A slang term for deliberate fire-setting: Arson.
Fave is a slang term for favorite.
It is slang for semen or ejaculate
Slang term for a German ( fritz was/is a German name)
A push , assault , over the top ,
It is a slang term meaning "lacking character or courage."
it is a derogatory term that is now a common slang.