a small frog, often in a pond or puddle.

Briefly, "the realization that each random passerby is living a life as vivid and complex as your own." Originally from the Dictionary of Obscure Sorrows, which has a lot more beautiful neologism definitions like this you might enjoy.

Noun. An adolescent (often girl) who is charming but wilful. Wants to be grown up but also to stay as daddy’s girl. Term Often used Endearingly by a Father when talking with a daughter