empty words

empty suit

An ineffective or incompetent person in a place of authority.

empty the clip

To compete with great vigor, especially by making numerous scoring attempts.

empty the tank

To make the utmost effort; to contribute to the absolute limit of one's energy and abilities.

have words

To argue, to have an argument.

man of few words

A man who doesn't speak much; a habitually terse or taciturn man.

mark my words

Listen to me; used before or after a statement one wishes to emphasize, especially a prediction.

mince words

To restrain oneself when speaking by withholding some comments or using euphemisms in order to be polite, tactful, etc.

mouth the words

To speak insincerely.