a person regarded as the pre-eminent or perfect example of a particular type or category; the paragon ...1602 obs. rare
from cock (n. the most dominant, pre-eminent, or chief person or thing) + -all
FIRST DOCUMENTED USE
1602 - see EXAMPLE below
"...I haue had foure husbands my selfe. The first I called, Sweete Duck; the second, Deare Heart; the third, Prettie Pugge: But the fourth most sweete, deare, prettie, all in all: he was the verie cockeall of a husband. What, Ladie? your skinne is smooth, your bloode warme, your cheeke fresh, your eye quick..."
From: Antonios Reuenge
- John Marston