Other forms: jimmied; jimmying
To jimmy something is to force it open. If you lock yourself out, you can jimmy a window and climb inside your house. Or you could just use that key that's hidden under a rock by the door.
A thief might jimmy a car door to steal its stereo, and if you accidentally paint your kitchen window shut, you may have to jimmy it open. The verb jimmy comes from the noun jimmy, or "short crow bar," the kind of tool you'd use to jimmy something. In the 1800s, this type of crowbar was popular with burglars.