Longman Dictionary of Contemporary English
Wiktionary
n. An insulating hat with one or more decorative pieces of spherical fluff at the peak.
Usage examples of "bobble hat".
As our rather grand procession swept by, a voice called my name from a doorway and I turned to see a small dosser, with a bobble hat pulled down over his eyes, holding out a tattered copy of the Evening Standard which had formed part of his bedding.
She had fearsome big blue eyes that stared at me from inside all the wrappings of woolens and a bobble hat.
Mrs Tachyon reached up and adjusted the headphones under her bobble hat.
I was confronted by a six-foot woman with ginger hair, bobble hat and tadpole veil frilling her chin.
He had a favourite hat - a knitted Manchester United bobble hat that he wore pulled down over his forehead: 'Bobah', he called it, no one knew why.