Underthigh

1883, Albert Ellery Berg (ed.), The Universal Self-Instructor, New York: Thomas Kelly, “Out-Door Exercises,” p. 350, You may walk so as to use neither calf, under-thigh, nor hip to any appreciable extent; but it is hard work to run in any way so as not to develop all three […]

“She is female!” he bellows, stepping over my head in a fleeting perspective of underthighs and wobbling genitals.

Dalziel […] raised his left leg to scratch his under thigh.

His underthighs itched against the wicker seat of his chair.

[…] you will, I hope, never omit taking the hip-measure, which will produce a proportionate under-thigh: you will find at all times the under-sides, from the crutch to the hip, longer than the top sides.