A sexual manouvre. When the dominant partner is just about to come, they pin their partner down, and straddle their head, unleashing their load on to their partner's face, thus combining 'cheese' and the act of bundling. (bundle (see definition 5))
Jack: God, I'm nearly there
*tackles Jill to the floor and jumps on to her face -jizz-*
Jill: Oh my God, what was that?
Jack: That, dearest, was a cheese bundle. Now go and clean your face, we've got guests arriving in half an hour.
A question asked, usually rhetorically, after someone has finished talking/shouting at you about something they are very passionate about. It is used to show that you are bored of the topic and that you don't care about it. Can be used to try to calm a situation down. Either that or it is said out of frustration or annoyance or sheer incredulity. The best thing about 'are you quite finished?' is that the person usually shuts up once it has been said.
An indirect form of mockery.
Person 1: ...and so it's just RIDICULOUS! *seethes*
You: Are you quite finished? -_-