a person or thing that sucks, in particular.
a gullible or easily deceived person.
The gullible sucker actually plunks down money for an ‘outfit’ of software and seed emails.
a thing or person not specified by name.
he's one strong sucker
a shoot springing from the base of a tree or other plant, especially one arising from the root below ground level at some distance from the main stem or trunk.
The vitex, too, can produce water sprouts, or vigorous vertical growths from larger branches and root suckers from the base of the tree.
a freshwater fish with thick lips that are used to suck up food from the bottom, native to North America and Asia.
You have the fish - your piranha, your suckers , your blowfish, your sharks, your bottom feeders, your overpriced tuna.