lower limb

Either below the knee or elbow on a limb. It doesn't just mean the leg, Bruce.

Ray had an undefined injury to his lower limb

lower limb by Chickenlaksa September 16, 2020

lower than a limbo stick 

When someone does something so low, they would be considered "lower than a limbo stick."

Girl 1: My boyfriend just broke up with me over Facebook and didn't give an explanation.
Girl 2: Wow, he's lower than a limbo stick!

lower than a limbo stick by cabx3 July 5, 2010