Looks like this one. By the way, once I was visiting a local park that had wood mulch and the same result. A small child picked up some of the slime mold and the grandmother just about went ballistic! I told her it wasn't what she thought it was. Here is a link that might be useful: Slime mold

It wouldn't be completely possible to tell without a specialist inspecting it. There are dozens, if not hundreds, of decay fungi that will happily grow in coffee grounds. Once used, they're damp, near-neutral in pH, rich in carbon, and darn tasty. If the fungus shows slightly greenish, it's probably trichoderma. Duluthinbloomz4 made the general statement: "Bluish-green to green molds are usually Penicillium or Aspergillus. Black to brown-black molds can be Aspergillus niger, Alternaria alternata, Cladosporium herbarum, Cladosporium sphaerospermum, or Stachybotrys chartarum (a highly toxic mold). Reddish or pink molds are usually species of Fusarium." It's a good guess overall, although there are plenty of other molds of those colors (as noted, green molds have at least three choices, and I'd choose trichoderma over the two mentioned). Or, why it's smart to clean the coffee maker occasionally... :-)

Hi lisadimatteo, I know your post is older, but did you ever find out what the goo was? On a whim, I googled pink filled goo on plants and discovered what it was. Here is a link that might be useful: Lycogala epidendrum

hmmmm we are getting rain now, and a few days next week, though we are under average rainfall than usual for this time of year, I was going to hold off, but I may just put it down, like you said it won't hurt, ( then you will have some people saying it does hurt ) but I'd rather treat than have a fungal problem!