A food, beverage, drug or activity that helps people feel more comfortable in social occasions.

plural of personal lubricant

plural of social lubricant

(idiomatic, business, ethics, euphemistic) A bribe or extorted money, usually relatively small in amount, provided to a low-level government official or business person, in order to expedite a business decision, shipment, or other transaction, especially in a country where such payments are not unusual.

(rail transport) a device installed in order to reduce wear to both wheel flanges and the rails in the railway track.

plural of flange lubricator

plural of lubricating oil

An oil for lubrication of engines and other components.

plural of lubrication payment