say the word
say the word {v. phr.}, {informal}
To say or show that you want something or agree to something; show a wish, willingness, or readiness; give a sign; say yes; say so.
Just say the word and I will lend you the money.
I will do anything you want; just say the word.
If you get tired of those pictures, say the word.
Categories:
Source: A Dictionary of American Idioms