ironical, humourous, humorous, wry, incongruous, dry, irony, ferrous, post-ironic, ferric, more...

straightforward, sincere, genuine, literal, earnest

situational irony, verbal irony, dramatic irony, irony of fate, irony of life, more...

"that's rich!",   smacking of irony,   with a twist,   sarcastically said,   awful but funny,   sad but funny,   wryly amusing,   slyly sarcastic,   that's rich,   joking but serious