A nickname to give to a person in your group if there are two people of the same name. For example is there are two Samanthas in your group, and you are to lazy to call one Samantha A and the other Samantha B, re-name one 'Moogs'.
This name is also a nickname used for only the best of the best of the best friends. Do not use this name flippantly however, because it signifiys both awsomeness, and an un-wavering kick ass personality.
Julia: This is Samantha M.
Sean: But that blonde girl is Samantha S!
Julia: Yeah well we call one Samantha M. and one Samantha S.
Sean: Well fuck that, you will now be forever known as .... Moogs
Moogie: Can't I be known as Sam?
Sean and Julia: NO!!!