Music help

Sorry for asking this here but I'm desperate and I've already tried looking for it on my own,,,
Around like 4 years ago I came across this song on YouTube it was in Korean and the title was something like "OMNOMNOM" . I forgot the artists though . It wasn't a proper music video either and the video was a bit older than from the time I found it. The group (?) was male. All I remember from the lyrics was "do it do it do it ilgol nani jana" (the romanization is not accurate at all but it's what it sounded like to me). If someone possibly knows the song please tell me it was a good song,,