stimming
v.— «Other students performed tasks to play with nail polish or perfume, or to spend a few minutes “stimming,” or self-stimulating, with a bucket of colored buttons.» —“From Closet To Classroom: Schools And The Disabled Part Iii: Severely Handicapped—The Biggest Challenge” by Christopher Connell, Lee Mitgang AP Oct. 27, 1987. (source: Double-Tongued Dictionary)
Further reading
In a 1968 list of Cheyenne High School slang that ran in newspapers around the United States, Clyde, written like the man’s name, meant one’s head or mind. The Wyoming students’ examples included Use your Clyde! and put it out of your Clyde...
The words cushy, cheeky, and non-starter all began as Britishisms, then hopped across the pond to the United States. A new book examines what happens when British words and phrases migrate into American English. Also, if you speak a language besides...