Batrachos means frog, appearing only once in the NT (Revelation 16:13) where John sees three unclean spirits "like frogs" (hōs batrachoi) coming from the mouths of the dragon, the beast, and the false prophet. In the Greek world, frogs were associated with the noisy, slimy, and polluted. The image has clear OT roots in the second plague of Egypt (Exodus 8).
The frog-spirits of Revelation 16:13 are a deliberate echo of the Exodus plagues — positioning the Beast's empire as a new Egypt under divine judgment. The unclean spirits "like frogs" that proceed from lying mouths represent demonic propaganda: the unholy trinity's final deception gathering the nations for Armageddon (Revelation 16:14). Frogs emerge from the water (primordial chaos), come out in multitudes (overwhelming deception), and are associated with filth. The contrast could not be sharper: the Spirit of truth (John 16:13) vs. the frog-spirits of lies. The mouths that should speak truth become sources of demonic deception.