sucker

One that sucks, especially an unweaned domestic animal.

One who is easily deceived; a dupe.

One that is indiscriminately attracted to something specified.

An unspecified thing. Used as a generalized term of reference, often as an intensive.

A person. Used as a generalized term of reference, often as an intensive.

A lollipop.

A piston or piston valve, as in a suction pump or syringe.