to say the least

US /tə seɪ ðə liːst/
UK /tə seɪ ðə liːst/
"to say the least" picture
1.

used to indicate that one is understating something, or that the reality is more extreme or significant than what is being explicitly stated

:
•
The meeting was chaotic, to say the least.
•
His performance was disappointing, to say the least.
:
at the very leastto put it mildlyunderstatement of the year
:
leastat leastsaysayingthat is to saysay-soneedless to say