v. quiver and flutter noisily, twitch, thrash around. Mikupukúpu ang manuk sa abug, The chicken shook the dust off. Dì siya kamaung mulanguy maung nagkupukúpu sa túbig, He can’t swim. That’s why he just thrashed around in the water. Wà makakupukúpu ang táwung naantimánu pagkapusil, The man suffered a direct hit and didn’t even have time to twitch before he died.