Wiktionary
n. 1 (context aviation colloquial English) An aircraft which is too heavy and lacks sufficient power to be maneuvered easily. 2 (context informal chiefly jocular English) A fictional character who has superstrength, invulnerability and the ability to fly.
Usage examples of "flying brick".
I didn't care to be crushed by hundreds of pounds of flying brick, called to my outstretched hand by the strength of my magic and my fury.
The smell of blood came from several people who had been caught by shards of flying brick.
It looked very much like the flying brick of Starfleet gossip-but then, no brick she had ever heard of had been studded with quite so much weaponry.
It warmed him nicely and it wasn't until the third gulp went down that the alcohol content hit him like a flying brick to the head.
Tom Krome's chip had been caused by a flying brick during a street riot he was covering in the Bronx.
Lamentably, his amazing accomplishment didn't stop the twenty-five or so unlucky trainees crammed into the transport hold from being jostled about pretty badly as the damaged ship, now possessing all the aerodynamic qualities of a flying brick, belly-flopped in the middle of a Midwest corn field.