self-embedding
n.— «Health officials in Chicago are warning about a growing trend among teenagers who inflict pain on themselves by inserting foreign objects under their skin. The practice, called “self embedding,” is similar to cutting and is most likely to affect girls between 15 and 18 who suffer from depression.» —“Troubled Teens Inserting Objects under Skin, Doctors Warn” MyFox Dallas (Texas) Dec. 4, 2008. (source: Double-Tongued Dictionary)
Further reading
To slip someone a mickey means to doctor a drink and give it to an unwitting recipient. The phrase goes back to Mickey Finn of the Lone Star Saloon in Chicago, who in the late 19th century was notorious for drugging certain customers and relieving...
A psychiatric home health worker is curious about the use of nuthouse to mean “a mental health facility.” This term goes back to the turn of the 20th century. The word nuts itself once had an extremely positive connotation, referring to...