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1.
Usually a term of agreement (1), can also be used as a farewell (2) or a salutation (3). The definition depends largely on the inflection used.
1) "That shit is tight."
"Ya Wabba."
2) "I've got to go."
"Ya Wabba."
3) "Hey."
"Ya Wabba."
by Fred the Bible Writer March 02, 2005