eff
verb UK informal uk/ef/ us/ef/
eff and blind (also eff and jeff) 讲粗话;骂人
to swear, using words that are considered offensive
She was effing and blinding and saying it was all my fault.
They effed and blinded at him and told him to go away.
There was all this effing and jeffing and he was kicking the wall.
After lots of effing and blinding and threatening to search everyone, he found his sunglasses in his own pocket.
We've had parents turning up drunk, effing and jeffing at the teachers.
Phrasal verb
eff off! 滚蛋！滚开！
something that is said in order to tell someone rudely to go away
Note: Although offensive, this is less offensive than fuck off.