A tall chest of drawers, or combination of chest on chest, or chest with a small wardrobe on top. Usually with low bracket feet but always resulting in a tall piece of furniture.
(US) A tall beer can, either 16 or 24 ounces (473 or 710ml).
A kind of sail, a spanker.
A kind of long-stemmed wineglass or cup.
A long sheet-metal pipe for a chimney top.
Etymology
By surface analysis, tall + boy, but the furniture sense may have been originally modeled after lowboy, related to French bois (“wood”).