buttockswith
Buttockswith is a term that appears to be a misspelling or a portmanteau word with no widely recognized meaning in standard English or in any specialized field. It is possible the intended word was "buttocks," referring to the fleshy posterior part of the human body. The buttocks are primarily composed of adipose tissue and the gluteal muscles, which are among the largest muscles in the human body. These muscles play a crucial role in locomotion, including walking, running, and climbing, as well as in maintaining posture.
Alternatively, "buttockswith" could be a typographical error for a phrase like "but with" or "buttresses with."