an implement used for cutting and neatening something

a hedge trimmer

a person who adapts their views to the prevailing political trends for personal advancement

he is a clever trimmer, a closet federalist unchanged at heart

a person who decorates something

window trimmers

a crosspiece fixed between full-length joists (and often across the end of truncated joists) to form part of the frame of an opening in a floor or roof

trimmer joists

a person responsible for trimming the sails of a yacht

the spinnaker trimmer

a small capacitor or other component used to tune a circuit such as a radio set

trimmer capacitors

an excellent or outstanding person or thing

you little trimmer—it'll suit me down to the ground