watch which way the cat jumps, Play it by ear, when one dog barks at a shadow all the others join in; (fig) slavishly echo others, Feiyingfeixing, go adrift, pich up what others say, trim one's sails to the wind, take one's cue from changing conditions, Above the No, plagiarize
Antonym
be tarred with the same brush, friends, intolerance, Share bliss, Have difficulty with when, whole heartedly, a pack of rogues; a gang of scoundrels, a pack of rogues; a gang of scoundrels, To the last breath Come to their senses, to the last breath not to change, Wine and meat brethren, Fair-weather friends, Loser