Shorthand abbreviation for 'follow-up', typically used in electronic communication, to indicate that a subsequent discussion should occur or has occurred on the topic in question.

Person 1: "Did you want to talk about last night?"
Person 2: "Yes I did. I was hoping we could f/u on the fact your sister is stupid whore."
Person 1: "Oh yeah, bitch? Fuck you."

f/u by T_Whatevers October 27, 2011

Merch

F-U

Current WWE champion John Cena's oh-so-intimidating finisher. An overglorified standing fireman's carry.

Typical announcer over-reaction:

OH MAH GAWD! It's the F-U! Cena picked him up on his shoulders, and dropped him to the ground! A lesser man would have died from such an attack!

F-U by El Toro Grande October 4, 2005

Merch

F/U

Stands for "follow up."

I will f/u with what they said in a few days.

F/U by California Love Baby July 30, 2005

Merch

f-u

Possibly the worst finisher in pro wrestling history, done by none other than john cena. You want to know what an f-u feels like? Do a somersault on your bed. That probably hurts more than the fucking f-u.

The f-u, one of the most "devastating finishers" WWE has to offer.

f-u by Adrian July 3, 2006

Merch