• (adv.) Hanging at the cathead, ready to let go, as an anchor. • (adv.) Topped up; having one yardarm higher than the other.
A·cock'bill` adverb [ Prefix a- + cock + bill : with bills cocked up.] (Nautical) (a) Hanging at the cathead, ready to let go, as an anchor. (b) Topped up; having one yardarm higher than the other.