I only have a 'nodding acquaintance' with Greek history. [=I know only a little about Greek history]
We only have a 'nodding acquaintance' with each other. [=we only know each other slightly]
“The bathroom is around the corner,” he said, 'nodding' to the left.
(..) -What you got? - pictures of Ben on a rug. -Oh, my God! -Let me see! The One Where Rachel Finds Out Here's little Ben nodding off. Look at Aunt Monica's little boy! -Look, he's got Ross' haircut. -Let me see. Oh, God! Is he just the sweetest thing? (..)1995 TvShow: Friends Title: The One Where Rachel Finds Out Season: 1 Episode 24