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1.
Derived from one love and red salutes meaning true and pure love and solidarity under the Marxist philosophy. Generally used as a sign off, or slug, at the end of a letter or greeting from one communist to another.

If spelled wrong, as in red luv, means it is not pure nor true...this simply misspelling can be taken as an insult.
Bolchevique,

I just thought I would add a new word to the Urban Dictionary.

Red love always,
Communista
by Communista November 21, 2007
 
2.
red love is when you have sex with a girl who is menstruating (on her period)
"Red love?"
"No way man, when the river runs red, take the dirt path!"
by jenplicity November 29, 2013