The Collaborative International Dictionary
Mawworm \Maw"worm`\, n. [Maw the belly + worm.] (Zo["o]l.)
Any intestinal worm found in the stomach, esp. the common round worm ( Ascaris lumbricoides), and allied species.
One of the larv[ae] of botflies of horses; a bot.
Douglas Harper's Etymology Dictionary
Wiktionary
n. (alternative spelling of maw-worm English)
Usage examples of "mawworm".
Why, that mawworm was trying to diddle me out of my whole bank account!
Indeed, it had come to him, like a mawworm gnawing away at his insides, that she had been taking the precaution of removing Philippe to a place of safety before she herself set off knowingly into danger.
And then it came to him, insidiously, like a mawworm gnawing away at his pat assumptions.
He was a fine gent, very pleasant to everyone, even that mawworm Watson.
Since my family came to Canada, in 1888, the Hawsers and the Mawworms have rather lost touch, and I am anxious to renew the connection.