I also remember 'I may be green but I'm not cabbage-looking" from my youth (in Oz) where, in similar circumstances, it was also said "I didn't come down in the last shower". In times of drought the latter wouldn't carry the intended sting quite as well.

And if someone said "There's no flies on ... (me, him etc)" a swift counter often followed;
"No? But you can see where they've been!"

Cheers, Rowan