n. & v.
n. 1 a a person or thing that sucks. b a sucking-pig, newborn whale, etc. 2 sl. a a gullible or easily deceived person. b (foll. by for) a person especially susceptible to. 3 a a rubber cup etc. that adheres to a surface by suction. b an organ enabling an organism to cling to a surface by suction. 4 Bot. a shoot springing from the rooted part of a stem, from the root at a distance from the main stem, from an axil, or occasionally from a branch. 5 any of various fish that has a mouth capable of or seeming to be capable of adhering by suction. 6 a the piston of a suction-pump. b a pipe through which liquid is drawn by suction. 7 US colloq. a lollipop.
v. Bot. 1 tr. remove suckers from. 2 intr. produce suckers.