that's the stuff

that's the stuff (or the stuff to give the troops)

said in approval of what has just been done or said. British informal
See also: stuff

that’s the ˈstuff

(informal) used for telling somebody that they are doing something correctly or well, or doing something good: ‘I’d like my hair cut shorter at the front.’ ‘Like this?’ ‘Yeah, that’s the stuff.’
See also: stuff