suck in WordNet English dictionary

1. take in, also metaphorically
   "The sponge absorbs water well"; "She drew strength from the minister's words"
   absorb  suck  imbibe  soak up  sop up  suck up  draw  take in  take up 
   
2. provide sexual gratification through oral stimulation
   fellate  suck  blow  go down on 
   
3. give suck to
   "The wetnurse suckled the infant"; "You cannot nurse your baby in public in some places"
   breastfeed  suckle  suck  nurse  wet-nurse  lactate  give suck 
   
4. draw into the mouth by creating a practical vacuum in the mouth
   "suck the poison from the place where the snake bit"; "suck on a straw"; "the baby sucked on the mother's breast"
   suck 
   
5. draw something in by or as if by a vacuum
   "Mud was sucking at her feet"
   suck 
   
6. be inadequate or objectionable
   "this sucks!"
   suck 
   
7. attract by using an inexorable force, inducement, etc.
   "The current boom in the economy sucked many workers in from abroad"
   suck  suck in 
   

1. the act of sucking
   sucking  suck  suction