Sweating cats and dogs

On the You Tube show, Our Abandoned Home Renovation: A Year Later, a husband and wife are renovating a house and the wife comments on the amount of sweat. It’s at the 18:30 mark:

This is a mashup of “raining cats and dogs” (raining hard and a lot) and “sweating buckets” (sweating profusely). Both idioms describe intensity and copious amounts of something. A big shout out to Verbatim for spotting this one and sending it in.