A bulldog clip is a sprung metal clip that grips a thick wad of paper. Use a bulldog clip.
The spring is strong enough to hold a hundred sheets and to hurt a finger. The name began as a trademark and is now the ordinary word for a bulldog clip of any make.
1nounbulldog clipA sprung metal clip that grips a thick wad of paper.
“One bulldog clip held the whole manuscript together for nine years.”
bulldog clip is a clip.
Named for the tenacity of a bulldog's bite, and originally a registered trademark.
Possibly a reference to the tenacity of a bulldog’s bite. Regarding sense 1 (“binder clip with rigid handles”), Bulldog was originally a trademark registered to Brandsley Limited in the United Kingdom in 1944.
Etymology from Wiktionary, CC BY-SA
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