The act of doing bosh, usually achieved by swallowing a small quantity of 'bosh'. Larger amounts are highly recommended by tru-boshman, but advised against by the NHS. A group of boshers seeked help for this affliction by phoning the government help line for bosh, Talk to frank.
Frank however was unable to help, and was quickly overwhelmed with boshyness. Some say where frank failed, boshmen succeed.
He's bloody boshing again!