A low but capacious armed vessel, propelled with sails and oars, which formerly attended upon galleys; a scampavia, barge, or pinnace.
·vi To become moldy; to smell ill. II. Fust ·noun A strong, musty smell; mustiness. ...
Webster's Dictionary of the English Language
The lord-mayor's barge, and other vessels for holidays. (See fust.) ...
The Sailor's Word-Book