Definition of dappy in US English:

dappy

adjective

British
informal
  • Silly, disorganized, or lacking concentration.

    ‘a dappy lass’
    ‘he seemed very genuine—and slightly dappy’
    • ‘She is a yappy, dappy dachshund belonging to a man called Gordon.’
    • ‘I would like it to be known that I am not quite as dappy as the journalistic style of this article might suggest.’
    • ‘I've known quite a lot of dappy nurses over the years (one didn't even know what croup was).’
    • ‘Bernard was a complicated man; he came across to many as dappy, absent-minded, almost stupid.’
    • ‘Possibly I was just having a dappy day.’
    • ‘He'd gone by the time the dappy girl from local radio got there.’
    • ‘There was one very dappy waitress serving - took ages to order and we waited an hour for the meal.’
    • ‘Yes, the plot's a bit dodgy, and a bit dappy in places.’
    • ‘OMG, had a blonde moment there - I thought the title of this thread was a new game and was about to post something very very very dappy!’
    • ‘This twaddle is obviously aimed at dappy tourists who think we all still wear bowler hats, and have toilets at the bottom of the garden.’
    silly, foolish, giddy, light-headed, scatty, scatterbrained, feather-brained, hare-brained, empty-headed, vacuous, stupid, brainless
    View synonyms

Origin

1990s: probably a variant of dippy.

Pronunciation

dappy

/ˈdapē/