fall between

fall between (two things)

To drop between two things (specified after "between"). The baby's crying because her toy fell between the couch cushions. Uh-oh, that letter just fell between the wall and the radiator, where we can't reach it.
See also: between, fall

fall between (something and something else)

to drop between things. My loose change fell between the cushions of the sofa. I hope that my wallet doesn't fall between the table and the wall. I would never be able to move the table to get it.
See also: between, fall