[MrB]

Shaggy Defense:
When someone is caught committing a crime (mainly one sexual in nature, but can refer to all crimes), with overwhelming evidence to prove they did it; in their defense, the culprit denies that they were the one caught doing the crime.

Derived from the Shaggy song “It Wasn’t Me”, which describes a man being caught having sex with another woman by his wife, and subsequently denying that it was him she actually saw.

[dfwgator]

Or the Bart Simpson defense.

“I didn’t do it, nobody saw me do it, you can’t prove anything.”

[grundle]

a man being caught having sex with another woman by his wife, and subsequently denying that it was him she actually saw.

He must really think his wife is an idiot.