dick·er / ˈdikər/ • v. [intr.] 1. engage in petty argument or bargaining: she advised him not to dicker over the extra fee.2. treat something casually or irresponsibly; toy with something: [as n.] (dickering) there was no dickering with the lyrics. DERIVATIVES: dick·er·er n.

dicker ten, esp. of hides. ME. dyker (XII) points to an OE. *dicor, corr. to MLG. dēker, MHG. techer, (also mod.) decher :- WGmc. *decura — L. decuria set of ten.
Hence (perh.) dicker vb. trade by barter, haggle. XIX. A use supposed to be due to the bartering of skins on the N. Amer. frontier.

Dicker

a lot of ten hides or skin, 1307; a package or lot of ten; a considerable number.

Examples: dicker of gloves, 1307; of hides [ten], 1307; of horseshoes, 1307; of kisses, 1602; of knives, 1553; of news, 1641; of wit, 1598.