Synonyms for Small Fry (same or very similar meaning)
WordNet sense 1 (someone who is small and insignificant):
squirt, pip-squeakWordNet sense 2 (a young person of either sex):
child, fry, kid, minor, nestling, nipper, shaver, tike, tyke, youngster, tiddlerFrom the ODE community, based on WordNetadd/edit