Moo Hoo Man
The enigmatic Moo Hoo Man has not appeared in any published Sam & Max story, but is referred to several times.
 Character detail
Moo Hoo Man appeared in a never-published original Sam & Max comic by Dave Purcell, as well as several non-Sam & Max comics. In a post at the Telltale forums, he described him as "a big nosed guy wearing a minimal Greek-style laurel leaf (just one leaf over each ear)".