Under My Fan Posted in U Best definition Under My Fan a new catchphrase used by the kids. Means a secretive spot, hiding place, etc. Person 1: Where’d you put your book New Moon? Person 2: Oh it’s at home, under my fan. How satisfied are you with the definition? Looking for Under My Fan meaning? Delighted that you discovered the greatest determine on our web site! Recently this definition was actually observed 98 times.