Green’s Dictionary of Slang

chuff-chuff n.

[he/she puffs like a steam-engine or (juv.) chuff-chuff]

(W.I.) a pompous old fool.

[UK]R. Antoni Grandmother’s Erotic Folktales 27: This gown was only a dirty old sheet that he’d wrapped heself in to match the headress, and Johnny, let me tell you this King was really looking like a chuff-chuff now!