The Student Room Group
Tell her you're too busy having a party celebrating the fact that she's leaving.
Holiday bug?
Danube fever?
Chronic diarrhea?
Cancer?
A date?
Pregnancy?
Reply 3
Tell her she's a massive flange and you do not want to go to her party. Problem solved, no need to make excuses just be blunt.
Reply 4
D&V. Works a treat as an excuse!

The fact you just came home from holiday makes it more convincing! Not that anyone would ask details...
Just say you can't make it but don't provide an excuse. It'll make her feel bitter.

Or say 'I'll probably be tired'.
Reply 6
Just don't turn up?
What did she say for not going to the funeral? Use the same reason.
Reply 7
Delayed flight/tired from travelling/a combination of the two?
Reply 8
"I don't want to go"
either say your too tired, or the flight got delayed, or just say you can't make it and don't give a reason or just don't turn up
Just say: "No thanks, don't really fancy it."
Reply 11
'You're a monumental cow. I'm not coming.'

Or claim temporary paralysis. Something outrageous so she understands exactly how you feel. But she can't dispute it XD
Reply 12
"Thanks, but no thanks"
Say you couldn't sleep the night, and kept having nightmares and/or sleep paralysis, so you're very tired and can't attend.