(idiomatic) Effort or hard work, especially physical work involving repeated motion of the forearm, such as scrubbing.

(idiomatic, slang) A mechanic, often with the specific connotation of an automobile mechanic.

Lanolin.

A narrow pit or trench over which a vehicle can be driven and conveniently worked on from beneath.

A levered device for forcing grease into machinery. / (colloquial, due to its appearance) A small machine gun, particularly the .45 calibre M3 used by the US in WW2.

plural of grease gun

Any insulating grease that prevents corrosion of electrical connectors (and spark plugs etc) by preventing access by water

Alternative spelling of elbow grease

A fitting fixed to a piece of machinery, used as an inlet for lubricating grease by means of a grease gun.

(chiefly US, idiomatic, business, law, ethics) 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.