make light of

listen to the pronunciation of make light of
English - English
To regard without due seriousness; to joke or disregard inappropriately

I wish you wouldn't make light of the matter, when it obviously means a great deal to him.

act as if something is unimportant; laugh at, belittle
make of
If you ask a person what they make of something, you want to know what their impression, opinion, or understanding of it is. Nancy wasn't sure what to make of Mick's apology