Green’s Dictionary of Slang

chitterlings n.2

also chitterlins
[? f. butchers’ jargon frill, the mesentery veins, suspending the viscera from the backbone]

shirt frills, as affected by ageing dandies.

[UK]‘Jon Bee’ Dict. of the Turf, the Ring, the Chase, etc.
[UK]Hotten Dict. of Modern Sl. etc. (2nd edn).
[UK]Hotten Sl. Dict.
[UK]Sl. Dict.