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The act of ejaculating inside of a girl while she is on her period. After doing so, the cum and the blood mix together into a single fluid, which is a catalina ranch mixture.
Terren: "Dammit dude! I blacked out and brought this chick home last night. Apparently she was on her period and my drunk ass busted a nut inside of her."
Steven: "That's gross! I bet there was that catalina ranch mixture all over your bed! You gave that hoe the fucking Catalina Ranch Mixer!!!"
by Ty Does Moose Stuff August 30, 2016
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