In the City, if someone has to remain on the desk over lunch they are said to be barrelled. Can anyone explain where this expression may have come from?
Perhaps it's related to the old Navy idea of "It's your turn in the (apple) barrel." The concept was that - in the absence of female companionship - the cabin-boy or some other lowly person aboard had to get into a barrel and position himself conveniently in relation to the bung-hole for the delectation of more senior sailors. Need I be more specific?