Simply put, a conflation is an amalgamation of two different expressions. In most cases, the combination results in a new expression that makes little sense literally, but clearly expresses an idea because it references well-known idioms. All conflations fit into one of two major categories: Congruent Conflations & Incongruent Conflations.
Congruent Conflations are the more ideal (and more sought-after) examples of the concept.
These occur when the two root expressions basically reflect the same thought. For example,
“Look who’s calling the kettle black” can be formed using the root expressions
“Look who’s talking” & “The pot is calling the kettle black.” These
root expressions really mean the same thing—they are both a friendly way to point out