Subject: Mixed metaphors
Mixed metaphors:
A metaphor is a figure of speech in which a word or phrase is applied to an object or action to which it is not literally applicable. A mixed metaphor is the use of two or more unrelated metaphors that are incongruous or illogical when combined. Here are some mixed metaphors we’ve seen and heard.
One of the things you have to say for him: he doesn't mince his punches.
(1908 – 1997) German-born teacher, academic & humorist
They will never buy the cow if they can get the eggs for free.
(1971 – ) American actress