Longman Dictionary of Contemporary English
tin whistle
noun
EXAMPLES FROM CORPUS
▪ I walked up to one young guy in full get-up playing the tin whistle near the Harness and Saddle maker store.
▪ She might as well have had a tin whistle buried in that neck of hers.
▪ The older man plays an accordion, and the younger one plays a tin whistle in the musical interlude.
Wiktionary
tin whistle
n. (context music English) A small, high-pitched whistle that is blown from the end like a flute and is made of metal
WordNet
tin whistle
n. an inexpensive fipple flute [syn: pennywhistle, whistle]
Wikipedia
Tin whistle
The tin whistle, also called the penny whistle, English flageolet, Scottish penny whistle, tin flageolet, Irish whistle, Belfast Hornpipe, feadóg stáin (or simply feadóg) and Clarke London Flageolet is a simple, six-holed woodwind instrument. It is a type of fipple flute, putting it in the same class as the recorder, Native American flute, and other woodwind instruments that meet such criteria. A tin whistle player is called a tin whistler or simply a whistler. The tin whistle is closely associated with Celtic music.