Green’s Dictionary of Slang

1. tripe; thus kegmeg shop, a tripe shop.

1857

‘Ducange Anglicus’ Vulgar Tongue.

2. an intimate conversation [? pun on tripe n.¹ ; or tripe n.² , as a moral disapproval of the ‘rotten-ness’ of gossip].

1883

J. Payn Thicker than Water I 194: It was not unusual for Mrs. Beckett to seek half an hour’s intimate talk with her younger companion, which she playfully termed ‘a kegmeg’.