If you describe something or someone as wacky, you mean that they are eccentric, unusual, and often funny. 古怪的; 滑稽的
adjective [原级]乖僻的,古怪的
As if just riding a unicycle didn't look funny enough, add mallets and balls and you've got a truly wacky spectacle. 就好像仅仅骑独轮车看起来还不够滑稽一样,加上木槌和球,你就得到了一个真正古怪的景象。