usang noun English. The upper part of grain stalk where the fruit is and which is threshed to remove the grain. Example sentence: Subanen. Kali' ni Lingkugen pebentayay su palay, masi' ndi' pa megiik, lumbus pa gusang. English. When Lingkugen went to look at the rice, he was surprised to find it hadn't been threshed yet; it was all still on the heads.