Green’s Dictionary of Slang

fuck off v.

also fack off, fuck out

1. [1910s+] to leave, to go away.

2. [1940s+] (orig. US, also f.o.) to waste time, to idle, to avoid one’s duties; thus fucking off n., wasting time, acting lazily.

3. [1940s+] a synon. for go to hell! under hell n.

4. [1960s+] (US black) to waste, to squander.

5. [1960s+] to disregard, to brush aside, to put off.

6. [1970s] to miss out on something through one’s own or another’s ineptitude.

7. [1980s] to expel, to reject.

8. [1990s+] to stop.

9. [2000s] to annoy.

In compounds

fuck-off money (n.)

1. [2000s] a sum of money or an income large enough to give one the power of freedom from everyday constraints, i.e. one could tell one’s employer to fuck off.

2. a payment that persuades its receiver to go away or abandon a course of action.