dilicio blunder 

When one makes a mistake on the very first turn of a game, especially board games.

Whoa, a CLASSIC dilicio blunder. I can't believe you moved all the way to the end of the row in Tokaido.

dilicio blunder by Delicious Gimlet December 4, 2020

Biden's blunder 

A blunder bigger and more catastrophic than anything you've previously seen, a blunder so outrageous that it devolves into an unmitigated ( and unmitigateable) disaster when us foreign policy and us domestic policy is concerned

Well, the current immigration challenge at the us southern border is really a biden's blunder that someone will have to deal with sooner or later.

Biden's blunder by Uncle Dimma March 8, 2021

THUD Blunder 

THUD (Thuroughly Hard Upright Dick)

THUDs happen.

When a THUD happens at a completely unfortunate or embarrassing time, that is a THUD Blunder.

My date THUD Blundered while we were dancing.

THUD Blunder by ericizmine February 22, 2010

Blumpkin Blunder 

Where the lady becomes pregnant after giving a Blumpkin

"Do you love me mummy?"

"No, you were just a blumpkin blunder!"

Blumpkin Blunder by Zikoziko January 19, 2009

Biden's blunder 

A blunder bigger and more catastrophic than anything you've previously seen, a blunder so outrageous that it devolves into an unmitigated ( and unmitigateable) disaster when us foreign policy and us domestic policy is concerned

Well, the current immigration challenge at the us southern border is really a biden's blunder that someone will have to deal with sooner or later.

Biden's blunder by Uncle Dimma March 8, 2021

boxer blunder 

What happens when a guy puts on his boxer shorts backwards. The error is compounded when he fails to notice the error until he unzips his pants to piss after waiting until the very last minute to go, usually resulting in an embarrassing "accident ".

Todd: Why are you holding your backpack over your crotch?
Bill: I pissed my pants, man!
Todd: WTF!
Bill: Boxer Blunder dude.

boxer blunder by OneStarGator September 20, 2017

a blunder of interns 

A group of more than 2 interns is referred to (often by managers) as a blunder of interns, because of their enormous propensity for incomparable failure.

We were ahead of schedule and under budget until summer break started and a blunder of interns showed up.

a blunder of interns by TwinInDisguise April 17, 2019