Not the parent but it's just a typo for IMNSHO, surprised Google didn't get that with only a single adjacent letter swap error.

Ah, I apologize for having confused you. Mistyped "IMNSHO", which stands for "In My Not So Humble Opinion". (Originally, I had used "IMHO", but then have realized that my opinion is anything but humble.)

"In My Not So Humble Opinion." They switched some letters around.