hand-sitter

Noun

 * 1)  A person who sits on their hands; one who dawdles or remains idle when action is needed.
 * 2)  An unenthusiastic or unresponsive member of an audience.
 * 1)  An unenthusiastic or unresponsive member of an audience.
 * 1)  An unenthusiastic or unresponsive member of an audience.