Plural of crybaby; people (especially children) who cry easily or frequently, or who whine and complain excessively.
From 'cry' plus 'baby,' creating a compound noun meaning someone who cries like a baby. The term has been used derisively since at least the 1800s.
Every language has a version of 'crybaby'—French has 'pleurnicheur,' German 'Heulsuse'—showing that the image of a whining child is universal across cultures.
Complete word intelligence in one call. Free tier — 50 lookups/day.