poisoned pawn?

What exactly is the poisoned pawn in the sicilian and french winawer? I'm sure I've ran across this but I'm not putting the name with the games.

Nyxie

The poisoned pawn in the Sicilian Najdorf occurs after 1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 6.Bg5 e6 7.f4 Qb6 8. Qd2 Qxb2.
The b2 pawn is considered poisoned because in taking it black takes his queen out of the game for a decent amount of time. White also has plenty of compensation for the pawn.
The most common line is 9. Rb1 followed by 9. Nb3 (Spassky v Fischer 1972 for a good example of the latter line.

Apparently the principle is the same in the French Winawer, however I can't say I know it.

Sicilian Poisoned pawn (Najdorf) variation:
1.e4 c5 2.Nf3 d6 3.d4 cxd4 4.Nxd4 Nf6 5.Nc3 a6 = Najdorf. 6.Bg5 e6 7.f4 Qb6 (bringing out the queen before developing the queens knight is typical for the pp) 8.Qd2 (8.Nb3 would avoid the variation)Qxb2 (here it is) 9.Rb1 Qa3 etc... the play is very sharp and white usually gets initiative for the pawn

French (Winawer) Poisoned pawn variation:
1.e4 e6 2.Nc3 Bb4 (Winawer) 4.e5 c5 5.a3 Bxc3+ 6.bxc3 Ne7 and now the very sharp 7.Qg4 Qc7! (gives up the g-pawn) 8.Qxg7

Originally posted by Nyxie
What exactly is the poisoned pawn in the sicilian and french winawer? I'm sure I've ran across this but I'm not putting the name with the games.

Nyxie

Thank you all.