The phrase "designer dupes" refers to products that are made to look very similar to expensive designer items but are sold at a much lower price. Full definition
Just popping in to share a majorly good designer dupe with y ’ all! (girlaboutcolumbus.com)
I have good luck finding designer dupes at stores such as Old Navy, Topshop, ZARA and Nordstrom (in the non-designer sections, obviously). (treatsandtrendsblog.com)
I bought these Steve Madden boots last year and am so excited that Nordstrom brought them back again because they're a great designer dupe for a fraction of the price. (champagneandchanel.com)