A slang contraction of the words, "Yes, Sir!," connoting both surprise and enthusiastic approval.
Yowsa! I'll be right there.
by pjsesq May 28, 2017
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An exclamation of surprise, used in substitution for the word, "Fuck". Usually invoked when you have a bet that you will not use the "F word".
"Yowsa", cried Judy. That fucking hurts.
by keeldragger November 29, 2010
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