Green’s Dictionary of Slang

rodge n.

[airforce jargon, roger = message received and understood]

(US campus/milit.) a fact, anything that’s true.

[US]G. Underwood ‘Razorback Sl.’ in AS L:1/2 65: That’s a rodge.
(con. 1965) P. Caputo Rumor of War 219: ‘One Alpha, wait one, will you? That’s a roge. First name is Walter’.