Jeans that make your derrière (rear end, butt, booty) look phenomenal, usually worn by females and attract the attention of others.
The "little black dress" of the new millennium.
She wore her booty good jeans tonight even the pockets are poppin' fresh.
if a guy says it,to a girl it mean "hey your ass looks good"
if a girl say it to a girl it mean "what were you thinking" and if a gril says it to a guy it again mean "nice ass"