From the submitter: “My coworker just said this when complimenting my singing. He used an expletive the first time, but when he repeated it, he used a euphemism in place of the expletive. When I said, “That’s not what you said before,” he said he was trying to buttercoat it, not realizing that he was mixing two expressions. When I told him that what he just said is a malaphor of butter up and sugarcoat, he said that it perfectly conveyed his sentiment.”
This is a great word blend of “sugarcoat” (palatable, or easy to take) and “butter up” (to be nice to someone by flattery or other means). I think this should be a new phrase in the lexicon, and the above situation is a great example. A big thanks to Diana for sharing this one!