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A word in the language of ninjaish, originating from the phrase "btw" meaning "by the way" can be used in many different forms such as annoyance, agreement, questioning or confused, depending on the tone of voice used, and hand gestures that accompany.
"oh bietwah my appointment is on tuesday"

or "bietwah she is a skank"
by cooknutta May 21, 2010