"Buhang" is a word in HILIGAYNON, CEBUANO

búhang - Opening, gap, break, breach in
a—dam,—dyke,—embankment,—levee, etc.;
to open, breach a dam, etc. Buhángi ang
kahón sang humáy. Make a gap in the
bank of the rice-field. Ginbuhángan níla
ang púnud sa subâ. They made a breach in
the river-dyke. Ibúhang akó siníng púnud.
Please, open this dyke for me. Nagasupón
gid lang ang túbig dirí, kay walâ sing
buhangán. The water, naturally, collects
here, for there is no outlet.

buhang = bulhang.