MEANING: noun: 1. Any of the tendons at the back of the knee.
2. Any of the three muscles in the back of the thigh, connecting the pelvis and the knee.
verb tr.: 1. To disable or make ineffective.
2. To cut the hamstring.

ETYMOLOGY: From ham (the back of the knee) + string (tendon). Earliest documented use: 1565.

HAM STRONG - The Easter roast has started to turn bad

HAMS TIRING - I've been overtaxing my leg and hip muscles

SHAM STRING - what you use to tighten the pillowslip