Posted on April 21, 2019April 21, 2019 by Idioms Poster Bone in my side You’re a bone in my side.Jessica Coutts. A mixed idiom made up of Thorn in my side, andBone of contention. Source of this Mixed Idiom Said by Jessica Coutts, and sent in by Jonathan Leece, who has been documenting these in his office in Isle of Man for years. Products and Mixed IdiomsBuy now: You’re a Bone in My Side – T-Shirt Buy now: Bone in my side – Denim Hat – 100% Cotton Post navigationPrevious post: Were you born in a stable?Next post: Barking up a dead horse