The area of the body that is below the navel or lower stomach and expands down toward the genitals. It typically increases in size with age and affects women more frequently, especially due to heavy drinking, overeating, or childbirth. Could be seen as a lower beer belly.
That girl would be bangin' if she didn't have such a big poosh, and if she didn't flaunt it around like it's no big deal.
Verb. The portmanteau of the words "poop" and "push" being put together. To poosh is the act of squeezing to defecate resulting in feces in voiding feces from the bowels.