a bottomless pit v-link PHR, PHR after v
or v-link PHR, PHR after v
phraseIf you describe something as a bottomless pit, you mean that it seems as if you can take things from it and it will never be empty or put things in it and it will never be full.
A gold mine is not a bottomless pit, the gold runs out.
The problem is we don't have a bottomless pit of resources.
He's a bottomless pit as far as food is concerned.
See full dictionary entry for bottomless