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1.
1. (n) The illusion of a tan as a result of preforming oral sex that is preformed using tanning agents (lotions, oils etc) for extra lubrication.

2. (n) The illusion of a tan as a result of recieving oral sex with tanning agents used as lubricant.
"Did you see that ho with the brown mouth?"

-"Hahahah! YES! That chick has a serious oratan."
by scrbbl November 22, 2011