Definition from Wiktionary, the free dictionary
From krokodilo (“crocodile”), possibly in reference to Andreo Cseh's teaching method. When Andreo Cseh taught Esperanto, no one was allowed to speak their native language unless they were holding a wooden crocodile he always brought with him.
- (slang) to speak among Esperantists in a language besides Esperanto, especially one's native language or a language not spoken by everyone present (literally: "to 'crocodile'")
Conjugation of krokodili
- malkrokodili (“to speak in Esperanto among non-Esperanto speakers”)