I was exaggerating when I said it took forever.
No!
"Exaggerating" is a verb. It is the gerund form of the verb "to exaggerate".
By exaggerating the truth
downplaying, or understating
exaggerating
It means "you are exaggerating".
Exaggerating
Stating something as more than it actually is.
Mythomania is lying or exaggerating to an abnormal extent.
The differences between lying and exaggerating is that when you are exaggerate you can go over board but some of it may not be true. But if you tell a lie then you aren't telling the truth.
hyperbole