stand/stick out like a sore thumb idiom informal
与周围格格不入，显得刺眼
If someone or something stands/sticks out like a sore thumb, everyone notices them because they are very different from the people or things around them
Everyone else was in jeans and T-shirts and I had my office clothes on - I stuck out like a sore thumb. 别人都穿着牛仔裤和休闲服，而我穿着正装——我显得太扎眼了。