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1.
the act of walking down the hall yelling with your traps out
He was billering at the kids who were being loud past quiet hour.

Kent is Billering.
by Fred Flintstone of Trine November 29, 2012
 
2.
to move at a fast rate and intensify
The firefighters were battleing the blaze but it was billering out of control.
by james tripp January 30, 2008