one of these days 

You have one more chance and then it happens.

Becky: One of these days I'm walking away.
Actual meaning: I'm fed up with your shit, you have one more chance and I'm gone.

one of these days by Cant_even January 18, 2018

one of those days 

A day where you just want to break something, preferably something that will scream and/or bleed as you do it. You may or may not know of any direct causes, but most often, something bad happened early in the day which started you off in a generally bad distemperment that only got worse as multiple unfortunate events compounded to effectively gang-rape and murder your overall disposition.

Your bet bet is to stay away motherfucker, it's just one of those days.

one of those days by The Red Kaiser September 3, 2005

one of those days 

when you've drunk so much you transpire acid the next day and resent looking in the mirror to see the regret in your eyes.

"oh it's one of those days. demon days. we'll get over them."

one of those days by Krkič July 29, 2019