#1 suck v. 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". wn
#2 suck v. draw something in by or as if by a vacuum; "Mud was sucking at her feet". wn
#3 suck n. [sucking, suction] the act of sucking. wn
#4 suck v. [suck in] attract by using an inexorable force, inducement, etc.; "The current boom in the economy sucked many workers in from abroad". wn
#5 suck v. be inadequate or objectionable; "this sucks!". wn
vizzz