Please tell me the meaning and how-to-use of "be on board."
Native speaker’s answer
Rebecca
In this case, to "be on board" is not meant in the literal sense. It is a casual, idiomatic expression meant to mean that one is in agreement with something/someone, or to be part of a team or group. When the speaker asks "are you guys on board or what" he is asking whether the others are in agreement, and will participate in his suggestion. Ex: A: Let's watch a movie! Are you guys on board? B: That sounds like a great plan. I'm on board. Ex: The president was on board with the team's proposal.