The cheyenne line is a psychological line that separates platonic friendships and intimacy. The cheyenne line doesn't have to include sex, though it often occurs as people open up and be honest with someone else about matters that significantly affect them.
Lindsey: How was your date?
Marly: It was good, he crossed the cheyenne line when he drew a line from my nose to my lips and then kissed me.
Lindsey: What after?
Marly: We talked for two hours in my car about my divorce and my mother's passing.
Lindsey: Oh did you have sex.
Marly: Yea... We had a really honest and intimate conversation.
by bobsaget21 February 2, 2020
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