Tumbler

Tumbler may refer to:


 * Tumbler (firearms), a part of the firing mechanism in older firearms
 * Tumbler (glass), a type of glassware
 * Tumbler (pigeon), a pigeon breed
 * Tumbler (Project Xanadu), a unique identifier of a unit of text or an embedded link
 * Tumbler toy or roly-poly toy, a type of toy that can tumble over and then straighten up by itself
 * Tumbler, a machine for tumble polishing solid material
 * Tumbler, a participant in tumbling
 * Tumbler, part of a lock
 * Tumbler, an obsolete name for a porpoise
 * Compost tumbler, a tumbler for composting
 * Cryptocurrency tumbler, a service to mix and anonymize cryptocurrency
 * The Tumbler (Batmobile), a prototype military vehicle used by Batman in The Dark Knight Trilogy
 * The Tumbler, a 1968 album by John Martyn