using a big word or phrase in the incorrect context or getting the word slightly wrong. Most commonly uttered/slurred by people who are drunk and trying to pretend they are not.
"do you need some help with that?"
"No, I will do this off my own back",
"i think you mean ' my own BAT', and that was an unfortunate example of misconbobulation"
"Look at this field with some fine examples of topology" (ok that one is not likely to be said by anyone drunk unless they are actually lying in said field).