[1915–20; (swimming) cos(tume) + -ie]This word is first recorded in the period 1915–20. Other words that entered Englishat around the same time include: collage, costar, markup, neorealism, soviet-ie is a noun-forming suffix with a variety of functions in contemporary English, addedto monosyllabic bases to create words that are almost always informal. Its earliestuse, probably still productive, was to form endearing or familiar names or commonnouns from personal names, other nouns, and adjectives (Billy; Susie; birdie; doggie; granny; sweetie; tummy). The hypocoristic feature is absent in recent coinages, however, which are simplyinformal and sometimes pejorative (boonies; cabby; groupie; hippy; looie; Okie; preemie; preppy; rookie). Another function is to form from adjectives nouns that denote exemplary or extremeinstances of the quality named by the adjective (baddie; biggie; cheapie; toughie), sometimes focusing on a restricted, usually unfavorable sense of the adjective(sharpie; sickie; whitey). A few words in which the informal character of the prefix has been lost are nowstandard in formal written English (goalie; movie). Other words that use the affix -ie include: Dixie, brassie, cheapie, cutie, groupie
Examples of 'cossie' in a sentence
cossie
Doubt other people watched the flotilla in a cossie.
The Sun (2012)
Others show less cossie coyness with itsy bitsy bikinis and monokinis.
The Sun (2012)
However, this new cossie isn't the offering of a leading fashion label.
Times, Sunday Times (2017)
The 174.99 cossie has already sold out.
Times, Sunday Times (2017)
There's only one thing for it: cossie on, sunglasses off, dive in.
Times, Sunday Times (2014)
You dash indoors, change into your swimming cossie and dive straight in.
Times, Sunday Times (2016)
Pack your cossie and a picnic and spend the day splashing about in the clear waters.