no rhyme or reason

no rhyme or reason

also without rhyme or reason
without any reasonable explanation or purpose Because the cave was formed by gases that ate away the rock, there seems to be no rhyme or reason to its shape.
See also: reason, rhyme

no rhyme or reason

if there is no rhyme or reason why something happens, there is no obvious explanation for it I don't know what makes her behave like that. There's no rhyme or reason to it.
See also: reason, rhyme
References in classic literature ?
Everyone had some defect, of body or of mind: he thought of all the people he had known (the whole world was like a sick-house, and there was no rhyme or reason in it), he saw a long procession, deformed in body and warped in mind, some with illness of the flesh, weak hearts or weak lungs, and some with illness of the spirit, languor of will, or a craving for liquor.
This murder in particular, there's no rhyme or reason to it,'' said Detective Mike Oppelt.
There's no rhyme or reason except maybe a budgetary need,'' said Oropeza.
IT DOESN'T make sense that only one poet in the last 15 years has won the Nobel Prize for Literature - there's no rhyme or reason for it.
Some days are better than others, there's no rhyme or reason for it.
Setting the rotation: Howland said he would like to establish an eight- or nine-man rotation, something unheard of the past few years since there appeared to be no rhyme or reason to some of former coach Steve Lavin's substitution patters.
It seems to be there was no rhyme or reason to this egregious crime.