1)Something suggested in a blog coming true or seeming clearer after being read. (Similar to the way powers of suggestion "cure" afflictions or how having one person describe the "picture" they see in a cloud formation can cause someone else to see the same "picture").
2)A person (or persons) actually understanding (or "digesting") the theme or meaning of a blog.
"The mere bloggestion of what can happen if I didn't stop overeating made me change my lifestyle forever."
"It usually takes me a few minutes to bloggest what I read but if I read the blog again I can gain total bloggestion."