Definition of suckers:
(n) :
A person or animal that sucks, especially a breast or udder; especially a suckling animal, young mammal before it is weaned.
(n) :
(horticulture) An undesired stem growing out of the roots or lower trunk of a shrub or tree, especially from the rootstock of a grafted plant or tree.
(n) :
(by extension) A parasite; a sponger.
(n) :
An organ or body part that does the sucking; especially a round structure on the bodies of some insects, frogs, and octopuses that allows them to stick to surfaces.
(n) :
A thing that works by sucking something.
(n) :
The embolus, or bucket, of a pump; also, the valve of a pump basket.