look up any word, like sex:
 
1.
JCB
The expression comes from the JCB company, a UK-based manufacturer of heavy equipment founded by Joseph Cyril Bamford in 1945. It's like saying, "You'd need a bulldozer to dig yourself out of this."
From Ian Rankin's "Resurrection Men," an Inspector Rebus novel, Chapter 16:

"Fuck me?" Claverhouse was shaking his head. "You've got it all wrong, Rebus. It's you the boys in Barlinnie will be telling to bend over. Because if I can tie you to Cafferty and his operation, so help me I'll send you so far down they'll need a JCB to find you."
by RS Gordon October 01, 2007
 
2.
JCB
when a person is cornered and needs to be metaphorically "dug out" of a situation
You need a JCB to get out of this
by Naman Ali September 02, 2003