Green’s Dictionary of Slang

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

1975		G. Underwood ‘Razorback Sl.’ in AS L:1/2 65: That’s a rodge.
1977		(con. 1965) P. Caputo Rumor of War 219: ‘One Alpha, wait one, will you? That’s a roge. First name is Walter’.