'slip-joint pliers' definitions:

Definition of 'slip-joint pliers'

(from WordNet)
noun
Pliers with a joint adjustable to two positions in order to increase the opening of the jaws

Definition of 'slip-joint pliers'

From: GCIDE
  • slip-joint pliers \slip-joint pliers\ n. pliers with a joint adjustable to two positions in order to increase the opening of the jaws. [WordNet 1.5]