intersuck verb 2adjective 1forms 3 verb2 •Of cows: to engage in the abnormal behaviour of suckling each other's teats. •(rare) To suck mutually.And when by hard wringing them the blood appeared at their ends, they pricked them with some sharp point, and then mutually entersuck't each one the others. — 1603 adjective1 •Between sucks.Infants suck in bursts separated by rests, typically defined as a sequence of sucks with intersuck intervals of less than 2 seconds. — 2011 formsintersucked · intersucking · intersucks