Using the wrong word or term to describe something that has a specific word thinking that the term used is close enough. ie. calling a "table knife" a "butter knife" or a "sheet" a "blanket". Usually in the context that it has created confusion or the wrong supplies to be ordered.
"She kept butterknifing Rinse Aid on the shopping list so now we have a ton of dishwasher soap and we are out of dishwasher rinse fluid because she kept putting 'dish soap' on the list instead of Rinse Aid"