Definition of "maggot"

"Maggot!" said Catweazle angrily. "Sit thee down!"

1971, Richard Carpenter, Catweazle and the Magic Zodiac, Harmondsworth: Puffin Books, page 32

Are you not mad, my friend? What time o' th' moon is't? / Have not you maggots in your brain?

1620, John Fletcher, Women Pleased, III.iv

‘I am ashamed of him! how can he think of humouring you in such maggots!’

1778, Frances Burney, Journals & Letters, Penguin, published 2001, page 100

[…] If you draw, Sir, there's one prospect up the river, by the mills—upon my conscience—but you don't draw?'No answer.'A little, Sir, maybe? Just for a maggot, I'll wager—like my good lady, Mrs. Toole.'

1863, Sheridan Le Fanu, The House by the Churchyard

In the summer I had to get the sheep penned twice a day to maggot them and I needed a good dog.

1950, Frederick Daniel Smith, Barbara Wilcox, Sold for Two Farthings, page 82