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here and ready; often used in the beginning of RAP songs to indicate the artist is there and ready to jam

also "in full effect"
Start of No More by Christian RAP band dc Talk
DCT in effect!
by EHA July 18, 2006
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2
When a woman is on her period.
"What the hell is wrong with Susan today, she just bit my head off."

"I don't know, she must be in effect."
by Joe Schmuckatelli September 08, 2003
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