from Wiktionary, Creative Commons Attribution/Share-Alike License
- v. To tune wrongly.
from the GNU version of the Collaborative International Dictionary of English
- transitive v. To tune wrongly.
from The Century Dictionary and Cyclopedia
- To tune incorrectly.
- To sing out of tune.
mis- + tune (Wiktionary)
When I was a kid, I would mistune it and end up listening to some John Cage stuff and like, waiting for the joke. "