In my line of work I am confronted with people who blatantly or ignorantly misspeak.
Ex: Customer - "Hi. Can I get a bagel" Me - "I'm sorry, we only sell pretzels here sir." Customer - "Yeah, that's what I meant."
It happens so frequently there has to be a term for this. It's not parapraxis (Freudian slip), catachresis (no mixed metaphor), malapropism (no humorous intent), or mondegreen (person is articulate and literate).