Associations:

'''Buck up'' is an exhortation to persevere and remain cheerful.

''Buck naked'' simply means naked. The ''buck'' is added for emphasis.

When you ''pass the buck,'' you are evading responsibilities, or avoiding blame for a mistake.

In British slang, ''Buck house'' refers to Buckingham Palace.

To ''buck for'' something means to work hard in hopes of a particular promotion or other form of recognition.

In Australian slang, ''Buckley's hope'' or ''Buckley's chance'' means little to no chance at all.