tip the balance

Idioms and Phrases

Also, tip the scales ; turn the scale . Offset the balance and thereby favor one side or precipitate an action. For example, He felt that affirmative action had tipped the balance slightly in favor of minority groups , or New high-tech weapons definitely tipped the scales in the Gulf War , or Just one more mistake will turn the scale against them . Shakespeare used turn the scale literally in Measure for Measure (4:2): “You weigh equally; a feather will turn the scale.” The idioms with tip are much younger, dating from the first half of the 1900s.