Having your period/menstruating.
Sorry I've been so cranky these past few days; I'm surfing the red tide.
by the cheshire kat August 07, 2008
Top Definition
The act of having vaginal or oral sex with someone who is menstruating.
John: "Man, that's intense! I just caught Rob surfing the red tide."
by Eduardo Cullena January 07, 2009
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