arm wrestling

American Heritage® Dictionary of the English Language, Fourth Edition

1. n. A form of wrestling in which two opponents sit facing each other with usually right hands interlocked and elbows firmly planted, as on a table surface, and attempt to force each other's arm down. Also called Indian wrestling.

Wiktionary

1. n. A strength sport with two participants. Each participant grips the other's hand and tries to pin the other's arm onto a surface.