crab in a sack
n.— «They climbed on top of each other, and when the sack was opened, there were always a few dead ones, as the bigger and stronger ones crawled on the smaller ones, sometimes killing them. Hence the phrase �crabs inna sack.� When someone was ruthless and selfish, he was referred to as �crabs inna sack.�» —“A nostalgic glance backward” by Lydia Humes The Reporter (Belize City, Belize) July 7, 2006. (source: Double-Tongued Dictionary)
Further reading
If you speak a second or third language, you may remember the first time you dreamed in that new tongue. But does this milestone mean you’re actually fluent? And a couple’s dispute over the word regret: Say you wish you’d been able...