Why did Block B's Park Kyung call himself 'thrill greasy kiss'?

The October 5 broadcast of MBC's 'Radio Star'�featured Kim Joon Ho, Kim Dae Hee, Park Kyung, and Kisum with an episode on the topic of 'Cunning Geniuses.'�

On the show, Park Kyung talked about his life during elementary school when he was a part of 'Thrill Club.'

Park Kyung explained, "Zico was really popular in elementary school, but I was a nerd who just studied... I wanted to be a part of Zico's clique so I offered to fill in his attendance chart for him in return of being a part of the group. That group was called 'Thrill Club'."�

He also mentioned the messenger ID's, explaining, "The leader's ID was 'Thrill Tingly Kiss' and the assistant leader's ID was 'Thrill Sweet Kiss,'" making everyone on the show laugh.�

Park Kyung continued to share, saying, "Zico's ID was 'Thrill Crazy Kiss' and mine was 'Thrill Greasy Kiss.'"�

When asked what the leader of the 'Thrill Club' group is doing now, Park Kyung answered, "He is a Sunday school teacher."

SEE ALSO: Suspicions of embezzlement arise after 'Dispatch' claims that luxury brands donated ~1 billion won to the 'Breast Cancer Awareness Campaign Charity Event'