Uninvited

I hate prats who turn up uninvited.
If this was an attempt to spring a surprise for the host,
I think they've succeeded & it's something unpleasant.
They just don't realise the fact that they're uninvited for some very obvious reason.
And they still shamelessly turn up without bothering to inform the host.
Complete gits.
Don't ever try pulling this stunt on me.
I'll rip your head off if you try it.