Student or Learner
Is "up" necessary here?: "She effed that one up"
I've found a phrase "eff off" which is used to rudely tell someone to go away.
but what could "eff up" mean?
The phrase "eff off" means "f*** off", right?
To eff something up means to make a total mess of it, to ruin it. I more polite way to say it is that "he screwed that one up" and even more polite is "he really messed that one up."
I'm not a teacher, but I write for a living. Please don't ask me about 2nd conditionals, but I'm a safe bet for what reads well in (American) English.