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(noun) refers to the act of vomiting (just a little) in your own mouth as you burp. Also known as a "vurp".
I was leaning over to tie my shoe when I had a quack back. I had to swallow real quick before my date noticed.
by uuddlrlrbabastart September 29, 2005

Words related to quack back

acid reflux belch blow chunks burp puke toss cookies vurp