An abnormally large and ballin' estate/mannor near Montreal, Quebec (Canada)
It has a Tennis court, swimming pool, trampoline, billiards room, 8 living rooms and a lot of crunked out fools.
Will: Hey Sean, where are you goin tonight?
Sean: Stoneycroft man, its where the party's at! You should come, openhouse!
Also used to describe an awesome party: This place is so stoneycroft!