My proposal is the BOMPA (all caps), a mark that, when placed after a word, phrase, or sentence, signifies that the opposite meaning is intended and implied by the speaker, in addition to the original meaning.

Thus a word, phrase, or sentence is doubled and reversed upon itself. This would allow writers to approach paradox without spectacle, and contradiction without verbosity.

For example, one could write:
I look forward to old age (BOMPA mark)
I love you (BOMPA mark)
I'm happy (BOMPA mark)
I intend to serve my constituents with the greatest energy and goodwill (BOMPA mark)