Apart from its perfectly respectable use in the classic Wacky Races:
using this word will only serve to make you look desperate and slightly pathetic.
No, really, it will.
If you wish to be wacky then that's terrific. Go for it.
Wear the green wig.
Play those bagpipes in the butchers.
Swim in the lake in the shark suit.
But for heaven's sake do it for the fun of it, and not to try to make yourself look interesting.
Sunday Rest: Word Not To Use Today: wacky. This word, meaning a fool or an eccentric, surfaced in the 1800s. It describes someone who behaves as though they've been whacked over the head.