Or a burdizzo, and recoup the cost of the tool by castrating bulls.bolt croppers. You can recoup the cost of the tool by robbing bikes.
Depending on the type, possibly a shim from a coke can. Got pictures?
You can probably do it with a paperclip unless it's some big bad bastard lock. There's tonnes of tutorials on youtube.Actually, I like the sound of picking the lock
She's on Urban