What does this word mean?

Last night i was studying in my boyfriends bed and he had fallen asleep beside me. Someone texted him and i opened his phone to text back (i usually do this while he is driving.. i wasnt trying to snoop) It was his cousin but i didnt know how to reply back because i didnt know what they were talking about so i looked in his outbox to see. but the last message wasnt to his cousin but to this girl. It said " do have some more pow? that sh-- was fire" i know this girl sells but im not sure what he was trying to buy. what does pow mean?