Anticipating and preparing against the possibility that someone might outdo one; taking special measures to ensure one cannot be one-upped or outmaneuvered.

Synonym of money does not smell

(idiomatic, slang, African-American Vernacular) A warning to an individual who has greatly offended one's dignity or has acted or spoken insolently.

(idiomatic) Worthless.

(informal, euphemistic, humorous) not likely; under no circumstances; absolutely not

(idiomatic) Alternative form of never in a million years

not mentally sound; unintelligent

(slang, vulgar) Synonym of not have a pot to piss in

Used to distinguish emergency procedures from those which are just rehearsed. / (informal, often humorous, by extension) Used to make an announcement or draw attention to a fact.

(followed by a complement) it is not very common (that)