Top Definition
the act of forming an "O" with the thumb and the index finger and positioning the "O" on your chin.

Chin it is used as a swear of honesty, when one "chins it" he or she must tell the truth and only the truth.
"Hey I just got a new car!" "No way CHIN IT!" "I chin it"

"Hey guys I chin it I have to use the bathroom"
by Rollieo July 05, 2008

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