When one’s parts below the belt are confused
Do you want to see my down stairs mixup?
When you mistake someone else's chizzle for your own. It could be innocent and accidentally, or done on purpose with a malicious intent.
I got Chizzle mixup'd, I went to grab my chizzles, but someone grabbed mine and left me these dull and weak chizzles. "Innocent version"
What happened to that motorcycle you had? Chizzle mixup.
"Malicious version"