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1.
One who has big arse granny panties.
One who has a huge booty cheek and likes to wear frilly things because they ass is ghetto, big and a delectable . delicious butt panties. Jeanty sounds like panty so it's funny.
Boy: DAM she got front AND back!
Boy2: nahhh she just got a jeanty.

example 2:
mom: hunny where'd my jeanties go!?
girl: (whispers) in my pocket.

example 3:

patrick: well i guess youre gonna miss the JEANTYraid
krabs: the what!
patrick: i said well i gueeess youre gonna miss the jEAntyraid.
by pantysnatcherz December 10, 2011