From The Collaborative International Dictionary of English v.0.48:
Slush \Slush\ (sl[u^]sh), n. [Cf. Sw. slaska to paddle in water,
slask wet, filth.] [Written also slosh.]
1. Soft mud.
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2. A mixture of snow and water; half-melted snow.
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3. A soft mixture of grease and other materials, used for
lubrication.
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4. The refuse grease and fat collected in cooking, especially
on shipboard.
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5. (Mach.) A mixture of white lead and lime, with which the
bright parts of machines, such as the connecting rods of
steamboats, are painted to be preserved from oxidation.
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From The Collaborative International Dictionary of English v.0.48:
Slush \Slush\ (sl[u^]sh), v. t. [imp. & p. p. Slushed; p. pr.
& vb. n. Slushing.]
1. To smear with slush or grease; as, to slush a mast.
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2. To paint with a mixture of white lead and lime.
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