handbrakes on

expression used to describe the desperate situation one finds oneself in when needing to unload a huge shit. It can be quantified by numbers 1, 2, or 3 according to the ammount of anal traction required to hang on before the darkening of the daks.
"so sorry can't stay to chat but my handbrakes on 3 and I've just got to unload my breakfast"
by Chris the Chef December 19, 2007
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Handbrake bomb

Whilst driving and being tailgated, the driver of the front vehicle may lose the plot and pull the handbrake, therefore braking the vehicle without the brake lights coming on. The result is either causing the tailgater to crash or forced into drastic emergency manoeuvres.
Some bastard in an Audi was right up my exhaust pipe, so I handbrake bombed him. He'll think again before he tailgates a banger!
by munroburton June 30, 2011
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