To powwow or have a powwow is to have a quick meeting. People powwow when they need to discuss something.
Originally, powwow was a Native American term for a type of meeting or council. The term has since become a more general term for meetings and conferences, especially brief ones. Football players in a huddle are having a powwow. Two police officers may powwow before approaching a suspect. Anytime there's something to discuss and debate, you might need to powwow. At the end of a powwow, you should come to some kind of decision.