The story
Partial calque of Hokkien 抑無 /抑无 (a̍h bô / á bô, “or not; or no; or none”). See also Hokkien 抑是 (a̍h-sī / á-sǐ, “or”), 是抑毋是 (sī á-m̄-sī / sǐ á-m̄-sǐ, “isn't?”, literally “is it? or is it not?”).
Etymology from Wiktionary, CC BY-SA 4.0.
Partial calque of Hokkien 抑無 /抑无 (a̍h bô / á bô, “or not; or no; or none”). See also Hokkien 抑是 (a̍h-sī / á-sǐ, “or”), 是抑毋是 (sī á-m̄-sī / sǐ á-m̄-sǐ, “isn't?”, literally “is it? or is it not?”).
Etymology from Wiktionary, CC BY-SA 4.0.