Learn Hardcore Hebrew: אנחנו כבר ליד השער, אבל בואי נשב עוד שתי דקות ונחכה להודעה. - We are already by the gate, but let’s sit for two more minutes and wait for the announcement.

Not necessarily in a literal movement sense. In sentences like this, בואי often works like come on or let’s when inviting someone to do something together.

So אבל בואי נשב... is very natural Hebrew for something like but come on, let’s sit...

It can still feel connected to the basic verb לבוא = to come, but here it is mainly an inviting expression, not a command to physically come somewhere.

Why is it בואי and not בוא?

בואי is the imperative form used when speaking to one woman.

בוא = to one man
בואי = to one woman
בואו = to more than one person

So this sentence is addressed to a female addressee.

If the speaker is talking to one woman, why are נשב and נחכה plural?