What's the funniest word or phrase you've heard mispronounced?

My German friend has learned 3 languages outside of his native tongue and is incredibly proficient with communicating in each one. I admire him for it as someone who only bothered to learn english. There are times however, where idioms or expressions escape him a little bit and the other day he was complaining about his workload in the new year and ended his rant by saying with an exasperated sigh

"I guess I just need to bite the bucket"

Stunned for moment, I clued in and told him the expression was 'bite the bullet' and we spent the next few minutes sniggering about it.