通通 (tōng tōng) is an informal adverb meaning 'all, entirely' — it emphasizes that every single item in a group is included, often with a sweeping or exhaustive tone. It's stronger and more colloquial than 都 (dōu), and unlike 完全 (wán quán) or 全 (quán), it's used only for people or things, not for abstract completeness. It typically appears before the verb in spoken Chinese.