Boondie

A large rock that is below the surface of the earth.

A cause of Drillers grief.
Very hard to move when dug with a shovel (a machine may be required)

Driller: This hole is giving me a bit of grief... I felt a big Boondie down there, hope it doesn'tkick me of target too much...
Geologist: The hole has missed target, we wont be paying for that!
Driller: Yeah fuck me!! We hit a big Boondie down there and speared off...Fucking ground conditions mate...Run a survey mate you'll see it...Fucking joke.