7 Answers

To be fed up means to be tired of something.

REALLY IN ESSENCE  BORED  WITH LIFE   ARE YOU ? "NEVER LIFE IS TO SHORT .IF YOU ARE HEALTHY FIT CAN WALK TALK SEE HAVE FRIENDS ONE SHOULD NOT BE FED UP !!

At your wit's end........

 This cat is fed up !!!!!

Part of Speech: adjective
Definition: disgusted with
Synonyms: annoyed, blasé, blue*, bored, depressed, discontented, dismal, dissatisfied, down, gloomy, glum, jaded, sated, satiated, sick and tired, surfeited, tired, up to here, weary

I'm fed up with your laziness.  I'm fed up with your snotty attitude.  I'm fed up with you thinking you have all the answers.  I'm fed up with the neighbors' barking dog and noisy parties. 

THAT kind of "fed up" means, I CAN'T STAND THIS ANY MORE AND IT HAD BETTER STOP BEFORE I DO SOMETHING YOU AREN'T GOING TO LIKE! 

Really really want to SCREAM!!!!!!!!!!!!!!!! HULK SMASH!!