Top Definition
phrase describing a close personal bond between two or more people or inseparable friends

(suggests that those who are thicker than thieves will not forsake or betray any of the others)
Person 1:
Those boys have known each other since they were toddlers.

Person 2:
Yep, they're thicker than thieves.
#friends #buddies #pals #colloquial #bff
by BoarHog December 07, 2010
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