Green’s Dictionary of Slang

luff n.

[echoic of a puff of wind; i.e. that expelled while talking]

speech, talk.

[UK]‘An Amateur’ Real Life in London I 454: Poll, says I, hold your luff—give us no more patter about this here rum rig.
[UK]E. Howard Jack Ashore II 152: I talked rubbish – I fancied myself above and better than the world, and no longer a mortal man. But another luff, and I should have been a wreck.
[UK]H. Caine Deemster II 158: If I was the ould Bishop’s son I’d hould my luff too.