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1.
Its a swedish and finnish woman-name that comes from Karolina. Its also a nickmane for Karin. It means "the pure one"
Example: my name is Kajsa. I am pure.
by Kajsa July 15, 2005
 
2.
Kajsa is an acronym for Kings and Jaba-hut sworn awesomeness. Kajsa is extremely beautiful and many fellas are trembling on their feet when she comes comes around. Kajsa is an unique name and extremely awesome. Never fail to succeed.
Jaba-hut: OMG, are you Kajsa?

Kajsa: Yes, i am.

Jaba-hut: I swear awesomeness.
Kings: I do to.
by Elliott Bax. April 29, 2011