Here Thar Be Monsters
1. To tell somebody they are off topic.
2. To indicate that you're going to post/say something off topic.
3. To tell someone they missed the point.
4. An extreme version of Not Mind Safe.
2. "HTBM, but ever notice how birds are actually falling off the earth, not flying?"
3. "HTBM, n00b"
4. "Hey guys check out this picture I found of a man eating his own fingers (HTBM)"