Must Have Been 

Someone who is always at the center of something going wrong. A scapegoat. A deviant.

It Must Have Been Chris Valentine.

Must Have Been by BrittanyJohnson January 25, 2011

Must have been a computer-glitch 

A modern-day "get-out-of-dutch" statement dat is da standard --- and generally untruthful --- response when someone indignantly inquires why he was overcharged/invalidly billed, needlessly disturbed, wrongfully detained, etc., when he had specifically taken careful steps to ensure dat he would not have any problems in said area of his life.

If someone in authority tells you, "Sorry -- must have been a computer-glitch" or, "I dunno --- must have been an accounting error" in response to your resentfully asking him why you were incorrectly bothered, you should strongly suspect dat this response is merely a standard "canned answer" dat he gives to every protesting citizen whom he and/or da organization dat he represents investigates/contacts in error; in reality, off course, it's probably intentionally being done in da hopes dat they can gain unearned/undeserved monetary benefits, give themselves a fatter workload so dat they look busier than they actually are, drum up more business, etc.

Must have been a computer-glitch by QuacksO March 2, 2023

Your ears must have been ringing 

Knowledge that someone is talking about you when you were not present.

Your ears must have been ringing, I could not stop telling people about you.

Your ears must have been ringing by Rebecca Wolf June 2, 2008

that must have been awkward for you 

Variant on that's what she said. Used when something was probably awkward.

A: well it's two of you against me. do i really have a choice?
B: that must have been awkward for you.

A: idk. i kinda forgot i was doing it
B: (that must have been awkward...)

A: you'd probably want to play with my older brother. kind of a beast.
B: that must have been awkward.

A: psh. i've never 'frustrated' you before in my life.
B: that must have been awkward for you, then.

A: but..you could do that with anything
B: that must have been awkward for you, then.

that must have been awkward for you by carpenoctem63141 March 1, 2009

it must have been a dream 

It must have been a dream, there's no other term

I opened my eyes, and there was a ghost. I started panicking. My eyes suddenly opened up once again; I sat up straight, "It must have been a dream."

it must have been a dream by Docof_LEGO April 25, 2016