Slang definitions & phrases for get under someone's skin
get under someone's skin
To trouble or irritate; annoy; bug: That cackle of his soon got under my skin(1896+)
The Dictionary of American Slang, Fourth Edition by Barbara Ann Kipfer, PhD. and Robert L. Chapman, Ph.D. Copyright (C) 2007 by HarperCollins Publishers. Cite This Source
Idioms and Phrases with get under someone's skin
Irritate someone, as in She really knows how to get under my skin with her nagging. This expression no doubt alludes to burrowing or stinging insects that cause itching or similar skin irritations.
[ Late 1800s
Obsess someone or affect someone's deep feelings, as in Jean's really gotten under his skin; he misses her terribly. Cole Porter used this sense in his love song, “I've Got You Under My Skin” (1936).