Jordan 2NT
Where partner opens a major (say S), and overcaller doubles, responder bids 2S with a minimum hand, 3S preemptively, and a Jordan 2NT as a limit raise or better. XX in this position shows 10+ points, and tends to deny opener's suit.
S: Qxx
H: Qxx
D: KQxx
C: Axx
S: AKxxx
H: x
D: Axx
C: KJxx
W N E S
1S
X 2N P 4S
P/O
Responder would bid 2S with Qxx/Qxx/Kxxx/xxx, 3S with
Qxxx/xxx/Kxxxx/x, and XX with Qx/Qxxx/KQx/Axx.