"Boy's thighs" is a literal English equivalent of the Pennsylvania Dutch phrase "Boova Shenkel."
Specifically, the word "Boova" means "boy's." The word "Shenkel" means "thigh." The phrase actually is one of many names for Pennsylvania Dutch-style potato dumplings.
Scott boova's. originating in Ireland, boova got the idea from watching scraps of bark wash around in the waves. he then build a prototype, and the wave board was born. i assume how he came up with the name in obvious.