a machine or vehicle with a part that rocks or moves to and fro, e.g. a jigsaw

they invented a jigger that pulls nets under the ice

a person who dances a jig

a small sail set at the stern of a ship

a measure or small glass of spirits or wine

a jigger or two of rum

a rest for a billiard cue

a metal golf club with a narrow face

a small hand- or power-operated railway vehicle used by railway workers

rearrange or tamper with

conventional price indexes often jigger the market basket's content

a tropical flea, the female of which burrows and lays eggs beneath the host's skin, causing painful sores

a harvest mite