third hand

Short definition from Wiktionary

Noun

1. 1
   A tool used to squeeze caliper brakes against the rim of a wheel, as on a bicycle, thereby allowing adjustments to the brake cable.
2. 2
   A source two steps removed from direct communication.

Adjective

1. 1
   Having been relayed by two intermediate sources.
2. 2
   Not new, having more than one previous owner.
3. 3
   Alternative form of thirdhand.

Adverb

1. 1
   Alternative form of thirdhand.