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1.
When a girl is on her period and the blood clots come out looking like slugs or a slug hence "blood slug"
why the hell are there blood slugs all over the toilet?
by apollo4550 June 05, 2007
15 3
 
2.
those chunks in your period.
i had a mega blood slug come out of my vagina today.
by jesus gloria christ March 07, 2011
7 4