I believe that it was a reference to the covers of pulp science fiction magazines up until the middle 1950's, in which a favorite theme was some sort or other of Bug Eyed Monster (BEM) depicted ogling a scantily dressed human female. I never understood what they were supposed to DO with her, because of physical incompatibilities. Then, in the 1990's, we got our own BEM residing in the White House!
"End of the Hunt," watercolor, Winslow Homer, 1892
Looks like they're gutting it from inside the boat, which will probably need a good cleanup then.
What a delightful expression, BEM. Although I figure it to be overly kind for the previous occupant of the White House.
I guess it could be applied also to some of the ruder folks that get on FR