When pulling out of the driveway for a trip:
“And we’re off, like a heard of turtles!”
My kids would say, “HAVE WE ALL LEARNED A VALUABLE LESSON??”
I used to say that all the time when they were growing up (I still do.) A good way to acknowledge that something went wrong without people getting all,tense about it.
The term ‘to disconcur’ meaning to disagree. Tried using it once in a class and got some serious sideways looks. Teacher had to break it to me that it is not a valid word.
Probably not unique, but I always remember when someone would fail at at anything ‘graceful’ just say “smooth move, ex-lax”
Others may say these, but I’ve only heard my parents say them:
“Put a glass-eye in a duck’s ass and you could see that” = you’re blind as a bat or stupid
“We gotta douche this place” = thoroughly clean