English is scandalously lacking in politically and linguistically correct antonyms of this sort. The Queen can create the Duchess of Cambridge, so surely I can create the much-needed expressions "cisgress" (be a good boy), "cisvestite" (bloke wearing trousers), "cisaction" (no deal), and "cisom" (something that isn't a lintel). Anyone who doesn't disagree is a transsy.
Source: wiktionary