A person who laughs without making any sounds; laughing by just moving your mouth and shoulders.
Samantha tinkooed when I told her the story about Souplo.
by Smitworth May 29, 2005
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Derived from Tinker Bell. A fantasy creature that's very very tiny. As small as tinker bell. One that can fit in ones shirt pocket.

Among other things a Tinkoo is supposed to be very very naughty and mischievous. Has a fondness to cause trouble in a playful way.

Could also be used to describe a person with these qualities, except the size.
Dude, you're gonna have fun with her, Shes such a Tinkoo!
by NashtyBoy February 6, 2011
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