It can come out stringy looking that's how mine looked it looked like snot at first. The rest of mine came out 2day in a big glob looking like a glob of gel. Mine was clear in color but some peoples come out with a blood colored tint meaning clear but mixed with red or brown streaks. Mine also had no smell 2 it. Hope this helps.
I am just about 37 weeks and being induced tomorrow because of mild preeclampsia. The doc checked me a few days ago and I was 2 cm, 60%. I think my mucus plug started to come out this morning. It was clear, gel-like (similar to the mucus you check for for ovulation but more in quantity) and had a few small brown/light red streaks in it.
Your mucus plug will look like a slimy discharge and could have a bloody look to it. I know, pretty gross!!