Acting excessively hyper-masculine, derived from the way that bull Elephants secrete a thick smelly liquid(or machismo) when they undergo "Musth" (or Elephant-anarchy) and berzerker-rage on anything that moves including other Elephants,Rhinos and Humans.
Meant to be used in a mocking context.
Person 1: Check out that guy with the Skoal wife-beater, puffin' his chest out and trying to look tough.
Person 2: Oozin' machismo.
Both People: WAAAAHAHAHAHAHAHA!!1