I'm collecting common mispronunciations and misspellings. Let me know if you hear or see any good ones! This list contains a few that I hear and/or say all the time. Most of them I found here.
"Ghosts, for all intensive purposes, don't exist."
"I'm at your beckon call."
"Supposubly that theater is open now."
"Her opinions are very deep seeded."
"Let's take this out into the parking lot - mano a mano."
"Let me axe you a question."
"I'm going to nip that in the butt."
"Your point is mute."
"Don't pawn that off on me."
"He was lying prostate on the ground."
"If that's what you think, you've got another thing coming."
In response to "How are you?" either "I'm good, thanks" or "I don't feel so good."
"I would like my French dip with au jus, please". (“Au jus” means “with juice” so this literally would mean "I would like my French dip with with juice please").
Associates pronounced "Assoshiates".
Mahatma Gandhi spelled "Ghandi".
And of course, "nucular".