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have a case on

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Also, have a crush on. Be infatuated with someone, as in He's had a case on her for years, or Teenage girls often have a crush on this teacher. The first slangy term dates from the mid-1800s; the second, a colloquialism, dates from the late 1800s.

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Fill in the blank: I can’t figure out _____ gave me this gift.
The American Heritage® Idioms Dictionary Copyright © 2002, 2001, 1995 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company.

How to use have a case on in a sentence

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