Top Definition
another name for a girl's period. This is because your periods can sneak up on you out of nowhere like a ninja. The red's because of the girl's period.
Girl 1: ugh! The red ninja caught me today!
Girl 2: Was his name (t.o.m.)?
Girl 3: yup
by xoamrc November 02, 2009
Slang for Triple C's, aka Coricidin Cold and Cough. Contains DXM and will mess you up.
Ryan: Ouch, did you feel that?
Tom: No dude, what?
Ryan: That red ninja just kicked me.
by Ryan C March 29, 2004

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