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1.
A hindi term roughly translating to "get-out", or "ya right"

The term 'chal' in hindi as 'go', and 'na' as 'no'.

Emphasis of the 'na', prolonging it intensifies its use.
What a beautiful day!
-Chalna

Yo wanna grab lunch?
-Chalnaaaaaaaaa

Yo we getting laid tonight!
-Chalnaaaaaaaaaaaaaaaaaaaaaaaaa
by Patorre, Sabooty, and Sharmy November 19, 2012
 
2.
Name of a girl that you will think is black but is actually white. Likes to Drink, Smokes when Drunk, and will bang anything on two legs.
Nels: Hey hear comes Chalna.
Ray Ray: The black girl?
Nels: No the white girl to her left.
by dissfigured1000yardstare May 27, 2012