take the fall for

take the fall for somebody/something

  (mainly American informal)
to accept the blame for something bad or not legal that another person has done Bob'll take the fall for the director - he'd do anything to save his boss.
See bend over backwards, fall through the cracks, disappear off the face of the earth, land on feet, fall through the floor, drop into lap, go down like ninepins, go to pieces, fall off off the radar, fall between two stools
See also: fall, take