make a federal case out of

make a federal case (out) of (something)

To exaggerate or build up the importance of something; to make a big deal out of something. The phrase is often used to complain that someone is exaggerating a problem or alleged wrongdoing. So I ate your leftovers. Geez, don't make a federal case out of it! I'm not trying to make a federal case out of it, but I know you stole my new sweater!
See also: case, federal, make, of
Farlex Dictionary of Idioms.

make a federal case out of something

 and make a big deal about something
to exaggerate the seriousness of something. Come on. It was nothing! Don't make a federal case out of it. I only stepped on your toe. Don't make a big deal about it.
See also: case, federal, make, of, out
McGraw-Hill Dictionary of American Idioms and Phrasal Verbs.
See also:
  • (someone or something) promises well
  • all right
  • a/the feel of (something)
  • (I) wouldn't (do something) if I were you
  • (have) got something going (with someone)
  • (you've) got to get up pretty early in the morning to (do something)
  • a straw will show which way the wind blows
  • accompanied by
  • accompanied by (someone or something)
  • accompany