The males, the sage cocks, compete with each other by showing off their moobs, to the amazement of the female sage grouse. The females are picky about whose moobs are best, and usually only the fittest, most dominant male is successful.
2. Someone who thrusts their arms and moobs in a similar manner to a sage grouse, in hopes of attracting lots of women. It turns out to be ineffective compared to the birds.
Female sage grouse: "Oh wow, look at his spiky tail and moobs, it's so hot!"
2. "Stop showing your moobs, you sage grouse! You won't get any girls!"