Express an unintentional action or a regretful action; 'ended up doing', 'did accidentally'.
Long explanation:
The ~ちゃった grammar point is used to express unintentional or regretful actions. It is the informal, colloquial version of ~てしまった (〜te shimatta). It can be translated as 'ended up doing' or 'did accidentally' in English. The formation differs depending on whether it is used with a verb.