The Collaborative International Dictionary
Cockneydom
Cockneydom \Cock"ney*dom\ (k[o^]k"n[i^]*d[u^]m), n.
The region or home of cockneys; cockneys, collectively.
--Thackeray.
Wiktionary
cockneydom
n. The region or home of Cockneys; Cockneys collectively.