have nothing on

1. Have no advantage over something or someone, as in This car has nothing on my old one . [c. 1900]

2. Have no damaging information or proof of wrongdoing about someone, as in The police had nothing on him and so were forced to let him go . This usage is the antonym of have something on someone , as in Blackmail requires that you have something on someone wealthy . [c. 1920]

3. Be naked, as in Please bring in the mail; I just took a bath and don't have anything on .

4. Have nothing scheduled for a certain time, as in We have nothing on tonight, so why don't you come over? This expression, and its antonym, have something on , are abbreviations of have nothing (or something ) going on .

Idioms and Phrases

Also, not have anything on .