pecking noun. 
['pɛkɪŋ] LME.[from PECK verb1 + -ING1.]1.  The action of 
PECK verb1; an instance of this. 
LME.2.  Building. In 
pl. Misshapen and underburnt bricks used only for non-visible or temporary work. 
L19. Comb.
 Comb.: 
pecking order (a) a social hierarchy amongst a group of animals (orig. observed in hens) in which those of higher rank are able to attack or threaten those of lower rank without retaliation; 
(b) transf. any hierarchy based on rank or status. 
 [TahlilGaran] English Dictionary ▲