'grease gun' definitions:
Definition of 'grease gun'
From: GCIDE
- grease gun \grease gun\, grease-gun \grease-gun\n. A device held in the hand, having a supply of grease and attached to a reservoir of pressurized air, used to force grease between adjacent moving parts of a machine, especially in the bearings of motor vehicles. [WordNet 1.5 +PJC]