Top Definition
Alternative spelling of Oscar, Oskar, Osker. Not very common.
"How do you spell my name?"
"Oscar."
"No, it's Oska."
by DarkDevilDog March 27, 2015
1 more definition
A koala bear that stays on your desktop. The equivalent to bonzi buddy, oska will work as spyware and should not be downloaded.
Damn you, oska! I wish I never downloaded you!
by Michael Waldren May 23, 2004

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