stand (there) with (one's) bare face hanging out
To stand rooted in place with a helpless, doltish look upon one's face. Well, don't just stand there with your bare face hanging out—do something! I expected the sheriff to intervene, but he just stood there with his bare face hanging out.
stand there with one’s bare face hanging out
in. to stand someplace looking helpless and stupid. Say something. Don’t just stand there with your bare face hanging out.