bottom feeder

常见例句

LL: Unfortunately, there are a lot of bottom feeders in the world.
就是啊，这个世界还是有不少这种卑鄙的坏人。对了，Larry，这个bottom feeder是不是只能用来形容犯罪分子？
Some stingrays are bottom feeders and dine on crabs, clams, shrimp, and worms.
有些种类的刺鳐属于底层鱼类（bottom feeders），靠吃螃蟹、蛤蚌、虾和蠕虫为生；
She assures me that it was a source of shame to eat bottom feeders.
她向我保证说吃在海底觅食的动物，是件耻辱的事情。

This is an age of bottom feeders, if I can use that word on NPR.
NPR: Roundtable: Rice Takes Heat, Graduation Gap
The only valuable ones left are urchin, scallops and lobster — bottom feeders that create a living for only a few fishermen.
FORBES: Can Tidal Power Create Enough Jobs To Save A Dying Town?
Among the bottom feeders were McDonald's (not part of a typical viewer's food spread for a big game) and credit card titans Visa and MasterCard.
FORBES: Magazine Article