get (any) ideas

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get (any) ideas

To have thoughts or schemes about taking advantage of a particular person or situation. Often used in a negative imperative. I know you're excited that your parents are going out, but don't get any ideas—I'll be here watching you all night. We have an extra guard posted outside in case the prisoner gets any ideas.
See also: get, idea

get (or give someone) ideas

become (or make someone) ambitious, big-headed, or tempted to do something against someone else's will, especially make a sexual advance. informal
See also: get, idea
References in periodicals archive ?
Just don't go getting any ideas from how he makes his money
It's going to be at least three months and the surgeon told me not to be getting any ideas about the National.