urserthigh Share definition Flag pronounced (ur) (sir) (thigh) your lower ass and upper thigh area of your leg...a tender spot to get smacked. Ouch that hurt you smacked me right in my urserthigh urserthigh by deejersyork February 27, 2011 0 0 Get merch Get the urserthigh mug. Buy Now — $32.95 See more merch