in boxing, a jaw that is fragile and easily broken, and by extension a person who is easy to beatSubmitted from: United Kingdom on 17/07/2015
2
someone who is fragile and easily upset
There is a tendency among some reviewers to pull their punches – heck, some even refuse to get into the ring in the first place or duck back under the ropes as soon as they read a few pages and realise their subject has a glass chin.