English Dictionary

put up or shut up

verb

(idiomatic) To desist from saying something unless one is able to prove it; to act in a manner that makes further talk unnecessary.

If you have any evidence to support your claim, put up or shut up.

意味（1）

(idiomatic) To desist from saying something unless one is able to prove it; to act in a manner that makes further talk unnecessary.

If the evidence for modern Darwinian theory is so overwhelming, they should have called the bluff on the other side and come and made their arguments. ... They should have put up or shut up.