Could you please explain the words in this '一边对着双桅小帆船呶呶嘴'? I found this:
一边对着双桅小帆船呶呶嘴。“他帮我把船从巴拿马开过来。”
I nodded toward the ketch. " He helped me sail her up from Panama. "

What does '桅'mean here?
Does 呶呶嘴 mean 'nod'?
'桅' is short for '桅杆', which is mast. So '双桅' means two-masted. 
'呶呶嘴' literaly means 'Pout lips'(no sexual meaning here). It means instead of pointing that sailboat by hand, some one points the lips to the sailboat instead. Some time I do this kind of things when I'm being lazy or my hands are occupied.