Skip to main content
glass jaw

glass jaw

2 7.9
A weakness that makes someone easily knocked out in a fight
  • noun
  • /ɡlæs dʒɔ/
  • Informal
translation icon : mandíbula de cristal
  • His tendency to lose fights quickly showed that he had a glass jaw.

Examples

  • Boxers who frequently get knocked out are often described as having a glass jaw.

  • Yeah, big deal, the guy's got glass jaw.

  • Turns out, a punch could knock the pins into my brain... so it's worse than a glass jaw.

  • He had a glass jaw.

  • Ringside experts now believe Louis has a glass jaw, and may even be a dumb fighter.

  • DURAND: A glass jaw.

  • Also, he has come up from cruiser weight; he is not a true heavyweight, so when he fights the bigger guys like Price and Fury, he will struggle (unless they have glass jaws like Mitchell).

    Blog text (34)
  • Many fans believe that a boxer with a glass jaw cannot withstand tough opponents in the ring.

Synonyms

glass chin
vsglass jaw
  • Jargon
1 8.8

A weak jaw that makes someone easy to knock out

is a broader vulnerability to being easily knocked out or defeated

Surface Forms

glass jaw singular
glass jaws plural

Morphology

glass + jaw

The compound meaning is directly and transparently built from the constituents: 'glass' evokes brittleness/fragility and 'jaw' denotes the physical jaw, so a 'glass jaw' clearly suggests a jaw that is easily damaged or a person easily knocked out. This straightforward metaphorical mapping is predictable for a B1 learner who knows the words, making the expression readily comprehensible without special cultural knowledge.

Etymology

Glass jaw may come from a boxing image: imagine a jaw made of glass that breaks after one strong hit. So it means 'a weak spot' or someone who is easily 'knocked out'.