Here's a way to have some quick fun
Make up a nonsensical (or in some cases, sensical) simile
It's as __1__ as a __2__ __3__ in (or at) __4__
1 = adjective (unwise, unbelievable)
2 = adjective (attacking, misguided, )
3 = noun (animals are fun) (elephant, politician)
4 = month of the year -- or time period -- or event (April, a church gathering)
What did you come up with?