В ОДНУ (В ТУ ЖЕ) ДУДУ (ДУДКУ) ДУДЕТЬ (с кем)
collVPsubj:
humanthe verb may take the initial position, otherwise
fixed WO 1. to pursue the same course of action as another or others
(of two or more people) to act similarly
X и Y в одну дуду дудят = X and Y do (are up to) the same thing.
2. to repeat, usu. incessantly, another's opinion, judgment etc
usu. having adopted it as one's own)(of two or more people) to voice,
usu. incessantly, the same opinion, judgment
etcto repeat incessantly one's own opinion, judgment
etc: X дудит в одну дуду с Y-ом - X plays (pipes) the same tune as YX sings the same song as YX takes the same line as Y(in limited contexts) X parrots what Y says
X и Y (X с Y-ом ) дудят в одну дуду - X and Y play (sing, pipe) the same tune
X and Y
sing the same songX and Y take the same line
X дудит в одну дуду - X keeps harping on the same string (thing, subject)
X keeps repeating the same thing over and over.