adj.
a. Drawing milk from the mother or dam; hence, colloquially, young, inexperienced,
I suppose you are a young barrister, sucking lawyer, or that sort of thing. Thackeray. [ 1913 Webster ]
Sucking bottle,
Sucking fish (Zool.),
Sucking pump,
Sucking stomach (Zool.),
n. (Far.) A vicious habit of a horse, consisting in the swallowing of air; -- usually associated with crib-biting, or cribbing. See Cribbing, 4. [ 1913 Webster ]