intersuck

From inter- +‎ suck.

intersuck (third-person singular simple present intersucks, present participle intersucking, simple past and past participle intersucked)

1. (intransitive) Of cows: to engage in the abnormal behaviour of suckling each other's teats.
2. (rare) To suck mutually.
   • 1603, Michel de Montaigne, chapter 26, in John Florio, transl., The Essayes […], book II, London: […] Val[entine] Simmes for Edward Blount […], →OCLC:

     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.

intersuck (not comparable)

1. Between sucks.
   • 2011, Marsha Walker, Breastfeeding Management for the Clinician, page 149:

     Infants suck in bursts separated by rests, typically defined as a sequence of sucks with intersuck intervals of less than 2 seconds.