Thick
. Through thick and thin (Dryden). Through evil and through good report; through stoggy mud and stones only thinly covered with dust.
“Through perils both of wind and limb
She followed him through thick and thin.”
⁂ “Thick and thin blocks” are pulley-blocks with two sheaves of different thickness, to accommodate different sizes of ropes.
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Entry taken from
Dictionary of Phrase and Fable,
edited by the Rev. E. Cobham Brewer, LL.D. and revised in 1895.