ETYMOLOGY
from quick (endowed with life, animate [because it shakes or moves]) + mire
EXAMPLE
“… An euyll wyfe hathe nought ado to departe from her houſe leest that she go not in to the quycke myre but and she be commaunded a thynge she wyll do clene the contrary. Certaynly it is a vylaynous reproche unto a woman whan she wyll not obeye unto her huſbande. Wyues and maydens loke that ye lyue honestly and kepe chaſtyte / to the ende that ye wynnę and purchace good fame and good renowne. …”
From: The Shyppe of Fooles
By Sebastian Brant
Translated by Henry Watson, 1509
Lexicophilia 