Like the similar definition on this page, the act involves inserting one's head into the particular orifice. The original example that I've seen, and most others have also seen, is a video of a bald man putting his head (up to his ears) into a woman's vagina.
Did you see that video where that guy put his head in that chick's pussy? That's gotta be one seriously loose hole for helmeting.
Hermting is a way of describing a really sexy girl and a sort of take on the way you cough to get attention by going 'ahem'. So basically saying you would like to get her attention.
hermuling (verb) - when a person or persons show sociopath traits and/or starring into space while thinking dark thoughts. Certain people report a strange/mysterious aura around these hermuling individuals
-jeez, this girl is so weird... whats with her, is she okay?
-ahh, dont mind her... shes just hermuling
The act of shoving one's head up the anus of a man. This requires either surgical modification of the sphincter or EXTREME anal training with buttplugs. I honestly cantimagine this being possible, but there's some fuctup people out there and I'm sure its been done by somone.
Tired of rodents and peni, Richard Gere decided to finaly allow Jacko to savagely stretch his ass with a series of huge buttplugs and within a week of teribla anal torture he was ready to be HELMED, to take the greasy pale head deep in his anus.