How usually native chinese speaker pronounce the “的” orally in “他妈的”? Is it "Ta Ma De" or "Ta Ma Di"?
The 的 has two kinds of pronunciation, De and Di. Different pronunciation is used for different cases.
In 他妈的, the 的 is pronounced like: De, which makes the whole thing: Ta Ma De.
I never hear people say Ta Ma Di.
In case you didn't know, 他妈的 or 他麻痹(Ta Ma Bi) means Mother F**ker in English.
Hope this helps!