1 definition by reti323

Having sex with a girl who is currently on her period and producing a quite nasty result.

Incidentally, also the name of the transit system at the University of Alabama.
Peggy-Sue warned me about the dangers of having sex while she was on her period, but after I talked her into it. We went on the crimson ride and soon thereafter on my bed lay a crimson tide.
by reti323 September 28, 2009
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