Suck  —v. 1 draw (a fluid) into the mouth by suction. 2 (also absol.) Draw fluid from (a thing) in this way. 3 roll the tongue round (a sweet etc.). 4 make a sucking action or sound. 5 (usu. Foll. By down, in) engulf or drown in a sucking movement. —n. Act or period of sucking.  suck dry exhaust the contents of by sucking. Suck in 1 absorb. 2 involve (a person) esp. Against his or her will. Suck up 1 (often foll. By to) colloq. Behave obsequiously. 2 absorb. [old english]