The phrase "grumpy baby" refers to a baby who is often irritable, fussy, or easily annoyed.
Sentences with «grumpy baby»
Hooray for slightly grumpy baby instead of dead mom and baby! (skepticalob.com)
Millennials are mad that grumpy baby boomers are so judgmental of their fancy brunch habit, but it raises a good question: Whatever happened to saving? (treehugger.com)