Suck
/sʌk/
noun
An instance of drawing something into one's mouth by inhaling.
Milk drawn from the breast.
A weak, self-pitying person; a person who refuses to go along with others, especially out of spite; a crybaby or sore loser.
Synonyms: sook, sooky baby
verb
To use the mouth and lips to pull in (a liquid, especially milk from the breast).
To perform such an action; to feed from a breast or teat.
To put the mouth or lips to (a breast, a mother etc.) to draw in milk.