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1. When used as a compliment, it means the same thing as "sick" "cool" or "awesome"

2. When used as a diss, it means that a male's genetalia is overly small, like that of a newly born baby.
"That pussy was so good it was fucking miloscrill"

"Hey Rat, is it cold out? You're as miloscrill as a fucking baby"
by sourdude13 January 11, 2006
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May 1 Word of the Day
When some little bitchboy is acting like a little tiny pee pee poo poo baby and messing up the group plans.
I’m tired I wanna go home

“Oh I didn’t know it was pee pee poo poo hours”
by A7sa July 03, 2019
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