(For s.t. or s.o.) to back into a hole, crevice, tight space [pa-]; to stuff s.t. into a hole or crevice; to put or slide a bolt into a hole (as when bolting a door).
Pa--un imperative is used when telling s.o. to slide a bolt further into a hole or to stuff s.t. further into a hole that has already had s.t. stuffed in it.
That mouse backed into its hole again when it saw a cat.
Why do you stuff trash in holes/crevices all over the place here?