(of two people) to sit facing each other with the elbows resting on a table and clasping hands with each other, each trying to force the other's arm flat onto the table while keeping his or her own elbow touching the table
Father and son were arm-wrestling at the kitchen table.
2. (transitive)
(of one person) to engage in such a contest with someone
She could arm-wrestle a truck-driver twice her weight.
noun
3.
(of two people) an instance of two people arm-wrestling
4.
a contest or sporting match that is difficult to win
The shocking conditions turned the game into a scrap and an arm-wrestle.