Antonyms of adj true-blue

1 sense of true-blue

Sense 1
true-blue -- (marked by unswerving loyalty; "a true-blue American"; "a reliable true-blue country club conservative")

INDIRECT (VIA loyal) -> disloyal -- (deserting your allegiance or duty to leader or cause or principle; "disloyal aides revealed his indiscretions to the papers")

Similarity of adj true-blue

1 sense of true-blue

Sense 1
true-blue -- (marked by unswerving loyalty; "a true-blue American"; "a reliable true-blue country club conservative")
       => loyal (vs. disloyal) -- (steadfast in allegiance or duty; "loyal subjects"; "loyal friends stood by him")