what does the word "bat" [بط] MEAN?

[Kinzz]

@Hakuna_Matata

aisa taatoon wale school me hi hota hoga … jahan yaqeenan aap parhi lagti hein… achay schools me to ye cheezein nursery me hi sikha dete hein

Mai apne school nahi aaj kal ke schools Ki bat kar rahi hoo