Superlative form of tetchy: most tetchy.(adjective)
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Use "tetchiest" in a sentence
"You don't have to yellcap @ moi, eh? examines the grumpifried contents of Patrick French's authorised biography of the world's alleged "tetchiest" writer"
"There were raised eyebrows and palms-to-heaven gestures among the media battalion that follows Brazil after Dunga cancelled a scheduled press conference at the last minute – the latest minor skirmish in this tetchiest of relationships."
"This exchange over "comfort zones" was, according to an aide to Ed Miliband, the "tetchiest moment" of the campaign."