"Uncharacteristic move" refers to an action or behavior that is unusual or unexpected for someone, especially because it is different from their usual habits or patterns. Full definition
In a totally uncharacteristic move, I picked the hot pick over one of the more neutral colors. (straightastyleblog.com)
When the boys arrive at their secluded cabin for the party, they discover Joshy saying goodbye to a girl he picked up from the local bar — a rather uncharacteristic move and one that isn't ever addressed again. (waytooindie.com)
Apple caught us all off guard yesterday with a completely uncharacteristic move, dispatching the highly anticipated iOS 11.3 update to the brand - new sixth - generation iPad while leaving every other eligible iPhone and iPad user behind. (pocketnow.com)