Where does “bukang-bibig” come from?

bukang-bibig (Tagalog) comes from Tagalog bibig, from Proto-Malayo-Polynesian *bibiʀ, from Proto-Austronesian *biʀbiʀ — lip.

bukang-bibig (Tagalog): frequently uttered word or phrase; favorite expression

Definitions

  1. frequently uttered word or phrase; favorite expression

Ancestry of “bukang-bibig”, step by step

bukang-bibig traces back through two separate lines of ancestry.

via Tagalog bibig

StepLanguageWordMeaning
1Tagalogbibigmouth
2Proto-Malayo-Polynesian*bibiʀ(lower) lip
3Proto-Austronesian*biʀbiʀlip

via Tagalog buka

StepLanguageWordMeaning
1Tagalogbukaopen
2Proto-Malayo-Polynesianbukato open
Every word from Proto-Austronesian *biʀbiʀ →Every word from Proto-Malayo-Polynesian *bibiʀ →Every word from Tagalog bibig →