I lost the mucus plug with my three previous babies, but always well ahead of the delivery! To me it looked like a boogery squid! Lol
With my son it looked like someone blew their nose in my underwear. It was clear and a lot of slimy mucous.
With my daughter it came out with the "bloody show" and it freaked me out. Very bloody that time around.
This is my 3rd pregnancy, I don't remember loosing mucus plug with 2nd but that delivery was induced so maybe I lost it in hospital...but first pregnancy I distinctly remember! It was just as it sounds - it reminded me of a glue stick in appearance. I had gone to bathroom and it was on toilet paper in one whole peice. It was actually quite interesting lol