Turn a deaf eye

This amusing malaphor is a mash up of “turn a blind eye” (ignoring something) and “fall on deaf ears” (information ignored by the person it was intended for).  Both idioms involve the act of intentionally ignoring important information, perhaps making the blended idiom more emphatic  although patently absurd.  Both idioms are also four words, and both contain senses and body parts, which could also have contributed to the confused outcome.