When you fucked up so bad that YouTuber Swoop would make a multi hour long expose video dedicated to detailing your demise.
When the man made false accusations, doctored evidence, cosplayed a victim, victim blamed real victims, and then admitted he was inappropriately in group chats with minors was the moment he got Swooped.
A Swooner makes every attempt to impress the opposite sex by kind words and gestures in order to show interest without being direct about the fact they are interested. For instance, one might use larger than normal words, or be particularly silly or nervous when they speak during swooning. The swooning itself is a true act of trying to win over the opposite sex in the efforts of securing a relationship with that person.