Well, I suppose you could do it by forcing the wastegate open, although why you'd want to is another matter.
I had a circlip come off the wastegate actuator on my old Bluebird ZX and that happened (thought I had trashed the turbo), it drove like a pig with no boost.. don't forget, turbo engines generally run much lower compression ratios than N/A engines, so with no boost you end up with a gutless N/A motor....
Just make her pay for the petrol.. that'll slow her down!
Cheers,
Plug