pickholy terror . holy terror {n.}, {informal} A very disobedient or unruly child; brat. All the children are afraid of Johnny because he's a holy terror. Categories: add yours children informal noun Source: A Dictionary of American Idioms 'holy terror' on video Holy Terror - Mind Wars (Full Vinyl LP Album) [1988] Holy Terror, Part 1 - Atop the Fourth Wall Holy Terror - Mind Wars (1988) [HQ] FULL ALBUM H̲oly Terro̲r - Min̲d Wars (1988) [Full Album] HQ sort: relevance, mode: exact match, q: "holy terror", maxResults: 4, videoEmbeddable: true, videoSyndicated: true, safeSearch: strict, type: video Subscribe to: American IdiomsEnglish Slang Discuss