"Plop, plop --- whiz, whiz" refers to what hopefully happens soon after you take a laxative --- i.e., you copiously expel lumps of poop in a long series of loud splashes in da toilet-bowl, while also urinating profusely (noisy farting optional); you also supposedly feel much more relaxed and comfortable afterwards, da same as da famous antacid promises.
by QuacksO June 22, 2024