Not all there

exp.

Heard in Dublin

Slightly mad or not fully in possession of ones wits.

In use

Look at that poor guy, you can see he's not all there

Posh English

Observe that unfortunate fellow emerging from the psychiatric hospital. One can plainly see he is not entirely compos mentis.

  • Mad manAn eccentric, wildly entertaining or slightly unhinged individual who is great fun.
  • Mad as a bottle of chipsExtremely mental; see also: 'mad as a box of frog.
  • Mad dogs shyteA mad or erratic person.
  • Loo lahEccentric, delightfully unhinged, or slightly mad.
  • Out of his treeEither slightly mad or heavily intoxicated by drink or drugs.
  • A ya mad?!An incredulous exclamation expressing utter disbelief at someone's foolishness.