Green’s Dictionary of Slang

DT n.

1. the Daily Telegraph.

[UK]G.W. Hunt [perf. George Leybourne] ‘Bloomsbury Square’ 🎵 In the column of agony in the D.T. / I advertised hoping the fair one to see.
[UK]London Life 24 May 4/2: The D.T. is very irate on the subject.

2. see DTs n.