dog and maggot en · NOUN
Meanings
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(UK, dated, derogatory, slang, uncountable) Cheese and crackers.
[…] a bit of fried bacon for his breakfast, some 'dog and maggot' (biscuit and cheese) for his dinner, and 'rooty' and 'pozzy' (bread and jam) for his tea.
2009, Alan Weeks, Tea, Rum & Fags: Sustaining Tommy, 1914-18, page 8: