A pussy that is very loose and that can have at least five fingers inserted into it or two dicks.
Guy:"Babe, you have a loosy down here. I can fit like eight fingers in you."
Girl:"I know, I can fit my whole fist in there.... AWWWWW MY GOD THAT FEELS SO GOOD BABY WHEN YOU STICK YOU FINGERS IN MY PUSSY AND RUB MY G-SPOT WHILE SUCKING ON MY CLIT, FUCK!!!! OOOOOOOOO AW AW AAAWWWW AAAAAWWWWWWWWWAAAAAAA AAAAAAAAAAAAAAAAANGGGGGG. SUCK MY PUSSY HARDER! YESSSSSSSSSSSSS FUCK BABY YESSSS. OOOOOHHHHHHHHHHHHH MY WET PUSSSSSSSSSSSSYYYYYYYYYYYYYYYYYYYYYYY AHHHHHHH! YOU MOTHERFUCKER I LOVE YOU SSSSSSSSSSSSSSSSSOOOOOOOOOOOOOOO MUCH HONEY."
a woman that is very floosy in doing so her pussy is very loose as loose as a goose due to the fact that gooses migrate south for the winter making them a very loose wild animal so loose+ goose = loosy goosy
Dang that girl is loosy goosy or Dang im not talking to nancy cause i heard she loosy goosy