my interpretation of the X is that partner is a lifelong member of the Bedlam Bridge Club; hoping to survive the hand I call "Hamman eggs in one basket"
assuming the colors are us NV then pass is pretty much the %age call since this is BBF and I can choose my bidding system to match the hands I open a weird 15-17 1NT (which in reality normally has its own problems)
hmmm guess I am too old fashioned; for me pass used to show a min opening hand w/5+♥ and I didnt realize I was obligated to bid any second suit with 4+ cards