Merriam-Webster's Collegiate® Dictionary, 11th Edition
SUCK
I. verb
Etymology: Middle English suken, from Old English sūcan; akin to Old High German sūgan to suck, Latin sugere Date: before 12th century transitive verb
1. to draw (as liquid) into the mouth through a suction force produced by movements of the lips and tongue , to draw something from or consume by such movements , to apply the mouth to in order to or as if to suck out a liquid ,
2. to draw by or as if by suction , to take in and consume by or as if by suction , intransitive verb to draw something in by or as if by exerting a suction force, to make a sound or motion associated with or caused by suction , to act in an obsequious manner , to be objectionable or inadequate ,
II. noun
Date: 13th century
a sucking movement or force, the act of sucking