突突 tūtū chugging Origin Definitions Defs Strokes Stroke Words Sentences Sents 突突哝哝 tūtunóngnóng to mumble colloquial expression for mumbling or muttering to oneself continuously, often in complaint突突囔囔 tūtunāngnang to mutter To mutter or grumble to oneself continuously in a low voice; often used in the context of complaining.