Definition of a brick short of a load (or two sandwiches short of a picnic, etc.) in English:

a brick short of a load (or two sandwiches short of a picnic, etc.)

phrase

informal
  • (of a person) stupid or slightly mad:

    ‘she's two bricks short of a load’
    • ‘Ken is constantly confused and definitely ‘two sandwiches short of a picnic’, but, in his own ponderous way, is harmless enough.’
    • ‘No surprise, really - Harry has been a failure all his life, not to mention two sandwiches short of a picnic.’
    • ‘In short, because I've retired, I'm now being treated as if I'm two sandwiches short of a picnic.’
    • ‘People must think I am two sandwiches short of a picnic.’
    • ‘Or, that those who talk about the baptism of the Holy Spirit are one sandwich short of a picnic!’
    • ‘I may be two planks short of a sailboat a lot of the time but I generally know how to recognise a leading question just before I walk into it.’