The term 'left rolling in the aisles' is an idiom that means to cause someone to laugh uncontrollably. The crossword solutions for this term are 'SLEW' (4 letters) and 'slayed' (6 letters). 'SLEW' is an informal verb meaning to make a large number of something, while 'slayed' is a more formal verb meaning to kill or defeat someone or something. Both words can be used to describe the effect of the idiom, as it can be said that the joke or funny situation 'slewed' or 'slayed' the audience with laughter.