This means?

"cMn" wth does it mean? Ever since I first saw an IGN with this, and even today I think it means "semen" 'cause I read it as cMn=seem-un=semen. All I find on Google is "Childrens Miracle Network". I'm still clueless as to what cMn could mean. Anyone know? >.>

What other phrases/abbreviations/acronyms in IGNs have confused you?