The popular Australian meaning is to be broken or unusable.

A phrase to describe someone who is cognitively degenerating. Synonym of "going off the deep end". Can have varying degrees of severity.

Reference to the song "Hey You" by Pink Floyd. The line "and the worms ate into his brain" makes no sense in an otherwise linear and literal narration throughout the lyrics.

The male version of "cunt". This term is to be used when calling a man a "dick" or "asshole" doesn't suffice.

a male cunt

A combination of two words, "Mad" and "Cunt". Used to imply support or appreciation for an individuals action. Most commonly used among young Australian males “Munt” is most effective and prominent in speech during and after large consumptions of alcohol.

to be under the influence of something, usually something illegal ;) such as xtc

A man's asshole man+cunt=munt