咕噜 Traditional form: 咕嚕 Pinyin (reading): gūlu Definitions: (onom.) to rumble (of a stomach) to coo (of a dove) rumbling noisy drinking sound Characters: 咕 - mumble, mutter, murmur; rumble 噜 - verbose, talkative; mumbling Traditional characters: 咕 - mumble, mutter, murmur; rumble 嚕 - verbose, talkative; mumbling