Common terms:
* Misheard lyric: This is the most straightforward and accurate term, particularly when referring to music lyrics.
* Earworm: While not specifically about mishearings, this term is used to describe a catchy tune or phrase that gets stuck in your head, which can sometimes be caused by misremembering a lyric.
* mondegreen: This is a word specifically used to describe a misheard word or phrase, especially in song lyrics. It's often used humorously.
Other possibilities:
* Auditory illusion: This term is more technical and describes any misperception of sound, including mishearings.
* Misinterpretation: This term is broader and can be used for any misinterpretation, including those based on sound.
Ultimately, the best word to use will depend on the specific context and your intention.