giggle-box
n.— «I can relate to this, as I was affectionately called “giggle-box” throughout my school years. It never took much to make me laugh; and, before too long everyone else in the class chimed in.» —“Jo Ellen Gluscevich” by Rx: Laughter Frederick News-Post (Maryland) May 10, 2007. (source: Double-Tongued Dictionary)
Further reading
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...
In the 15th century, the word respair meant “to have hope again.” Although this word fell out of use, it’s among dozens collected in a new book of soothing vocabulary for troubled times. Plus, baseball slang: If a batter...