The story
Blend of string + trimmer, originally a trademark registered in the United Kingdom in 1977.
Etymology from Wiktionary, CC BY-SA 4.0.
Today it means: Synonym of string trimmer (“a powered, hand-held garden implement that uses a rotating monofilament line to cut grass, etc., without damaging other objects”). Full definition →
Blend of string + trimmer, originally a trademark registered in the United Kingdom in 1977.
Etymology from Wiktionary, CC BY-SA 4.0.