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1.
Evolved from off tha hook, then off tha chain, to chain link. Means when something is really awesome, bitchen, or groovy.
"That weed is chain link!" "Her tits are chain link"
by it's me stupid April 27, 2010
 
2.
A link to an external site
Follow the chainlink to obtain info in addition to that already provided by the frequented site.
by Hercolena Oliver October 27, 2008