a rush on (something)
A large, sudden, and widespread demand for something. I'm sorry, we had a rush on the chocolate cheesecake this afternoon, so I'm afraid we're out. There's always a rush on bed linens when the college students move back into town for a new semester.
Farlex Dictionary of Idioms. © 2015 Farlex, Inc, all rights reserved.
rush on somethingand run on something
a large demand for something. There was a rush on bottled water during the drought. During the hot summer, there was a run on air conditioners.
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs. © 2002 by The McGraw-Hill Companies, Inc.