Sentence:  We've heard of stories of grooms getting nervous before their big day – not because they're afraid of botching their vows, or welling up in unmanly but happy tears – but because of the tasks that await them during the <WSD>gatecrashing</WSD> ceremony. 
Meaning of the word marked with <WSD> tags:  Part of a traditional Chinese wedding ceremony in which the groom and his groomsmen complete several difficult or embarrassing tasks prepared by the bridesmaids to prove his love for the bride.