"Sobsob" is a word in HILIGAYNON

sóbsob - To fall to the ground on one’s
face. Andam ka, agúd índì ka makasóbsob.
Look out, lest you should fall on your face.
Nakasóbsob ang íya bábà sa dútà. He bit
the dust. (cf. dágpà, dúsmò, hágmak,
dámhag).

sóbsob - See sónson, súnsun—to do often,
frequently, etc.