not worth a whistle

all one's life's worth

A momentous matter; a very serious risk; a difficult task or situation.

blow the whistle

To disclose information to the public or to appropriate authorities concerning the illegal or socially harmful actions of a person or group, especially a corporation or government agency.

clean as a whistle

Very clean.

dime's worth

An insignificant amount

money's worth

Satisfaction.

not worth a brass farthing

Worth nothing or next to nothing.

not worth a Continental

worthless, lacking in value, especially due to economic inflation.

not worth a dime

Worthless or nearly so: lacking in value.