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Definition 2025

thick and thin ‎(uncountable)

Both thickets and thin woodland; (through) all obstacles in a path.
- c. 1390, Geoffrey Chaucer, "The Reeve's Tale", Canterbury Tales, Ellesmere ms:
  Toward the fen / ther wilde Mares renne / fforth with wehee / thurgh thikke and thurgh thenne […]
- 1590, Edmund Spenser, The Faerie Queene, III.1:
  His tyreling Jade he fiersly forth did push / Through thicke and thin, both over banck and bush […]
(idiomatic) Both good and bad times.
"I must follow him through thick and thin." - Miguel de Cervantes^[1]
- Hudibras
  Through thick and thin she followed him.
- Coleridge
  He became the panegyrist, through thick and thin, of a military frenzy.