He said my buttocks are like CUTE little hills of flesh.
This kanji is axe + one line (which we'll call the surface of the earth) So we can say . . . I'm standing on top of the earth of the hill holding my axe!
sand dune ★☆☆☆☆ NEO 砂 (sand) + 丘 (hill) = 砂丘 (sand dune)
KANJIDAMAGE