stick out like a sore thumb
US /stɪk aʊt laɪk ə sɔr θʌm/
UK /stɪk aʊt laɪk ə sɔr θʌm/

1.
顯得格格不入, 非常顯眼
to be very noticeable in a way that is different or unusual from the surroundings
:
•
Her bright red dress made her stick out like a sore thumb at the conservative event.
她那件鮮紅的裙子讓她在保守的活動中顯得格格不入。
•
The modern building will stick out like a sore thumb in the historic district.
這座現代建築在歷史街區中會顯得格格不入。