blow out of proportion

You forgot my birthday, I’m gonna divorce you.
Woah! You’re blowing this way out of proportion.

Proportion
the relationship of one thing to another thing, usually we use this word when we talk about size, quantity, the number of sth. It’s always comparison.

adj: proportionate
the opposite way is disproportionate
His body is disproportionate
He has a disproportionately large head.
His head doesn’t match his body

Out of proportion:
that means disproportionate, when something is too large or small in comparison to something else.

Blow out of proportion
blowing
blows
blown
blew
here blow means make, make out of proportion

A black guy was selling cigarettes illegally, so the police was killed him.
The police response was blown way out of proportion
Mark, don’t blow it out of proportion, not all American cops are bad.
You’re right, I blow it out of proportion, but I still think American officers are tools(if you call someone a tool, it’s an insult, that means someone is just useless, stupid ）

I think the yellow dress looks better on you.
you think I’m fat, you hate me.
no , I love u, you’re beautiful, don’t blow the situation out of proportion.