Ah-kum-bah

A roar-like expression most frequently used by a dominant alpha male while displaying his obviously superior physical strength to other males, or to himself in a mirror while flexing biceps.

As Terry confidently rolled up his sleeves to reveal his protruding biceps, he passionately gazed into his washroom mirror and asserted with a rumbling roar: "AH-KUM-BAHHHHH!"