make a big deal (out) of (something)
idiom
variants:
or make (something) into a big deal
Definition of make a big deal (out) of (something)
: to treat (something) as very important or too important
The girl's song was far from perfect, but her parents made a big deal of it, and she was very happy. Don't make such a big deal (out) of missing the bus: there'll be another one along in a minute.