I don't no
It's the go-to excuse of someone who's lying through their teeth and trying not to get caught. Like when someone's in trouble and they're f***ing desperate.
"I don't no what you're talking about.", Alberto Gonzales, while being grilled by Congress.
"I don't no, I swear!", The guy who stole the office supplies.
"I don't no, I was sleeping!", The kid who missed the test.", @lisa890