variants:
or less commonly nicknack
plural knickknacks also nicknacks
Definition of knickknack
: a small trivial article usually intended for ornament
a collection of colorful knickknacks Known in the computer industry as tchotchkes, which is Yiddish for cheap trinkets, the knickknacks distributed in the past year have included "Love Me Tender" toilet-roll dispensers, wax eyeballs, chocolate computers and Nerf-ball launchers.— Jim Carlton Melissa Etheridge's spacious two-story home outside Los Angeles is filled with knickknacks from her life: Aside from awards and photos, there is a small collection of vintage neon clocks … and a Thelma & Louise poster signed by the cast (including a then-unknown Brad Pitt).— Lynette Rice
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Merriam-Webster unabridged
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Time Traveler for knickknack
The first known use of knickknack was in 1682
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