naturally asspirated
Refers to a person's digestive system dat is able to eliminate intestinal-pressure by farting "unassisted"; i.e., it can just pass gas "on its own", without having someone else come and squeeze da person's abdomen to help him "let 'er rip".
In his chapter, "A Tactful Remedy", famous veterinarian-author James Herriot describes his dilemma with a huge boxer-dog dat had a terrible flatulence issue; da dog was definitely 100% "naturally asspirated" in dat he farted effortlessly and totally "on his own", with no need for "assistive hand-pressure" or "supplementary squeezing" to force said obnoxious vapors to exit, da way dat da ultra-pampered Pekingese Tricki Woo had become from eating his favorite super-calorie-rich "people foods" diet and thus often could not pass waste on his own. Da socially-discreet Herriot solved da problem by gently suggesting dat da ultra-genteel and dignified owner of said gigantic amiable-natured-but-odiferous-butted pooch give him away to a crusty old fogy who had lost his sense of smell sometime earlier.