One of these days

We use this expression to say that something negative will happen sometime – perhaps soon.

You can use this phrase in ………… language.

 Spoken
 Informal

Example 1
A: She’s so aggressive!
B: Yes, one of these days I’m going to hit her.

Example 2
A: I always park here in the blue zone with no card.
B: Be careful. One of these days you’re going to be towed away.