When it comes to describing someone's strange or odd behavior, using the same phrase "went wacky" can become repetitive and tiresome. Thankfully, there are plenty of synonyms and phrases that can be used to spice up your descriptions. You might say someone "went off the deep end," "lost their marbles," "went bonkers," or even "lost their grip on reality." Other options might include "had a meltdown," "went crazy," or "flew off the handle." No matter what synonym you choose, trying out different phrases can lead to more varied and interesting writing.