I've mostly settled into looking at rule34.xxx for that specific fetish, a lot of that stuff gets posted there. excessive_cum is a widely used tag (I believe related sites like gelbooru and e621 use the same tag, but it's been a while / haven't used that site respectively). cumflation is often a good proxy for it too, but is as different from that as this whole big sperm thing so it depends on if you're actually into that. Though keep in mind any good gallery has some advanced search features, so you should be able to put for example excessive_cum -hyper_sperm to get stuff with excessive_cum but not hyper_sperm. Searching hyper_sperm is actually a much rarer tag than I thought though so maybe there's another tag I'm not aware of. Also putting sort:score in the search makes it like a "Top: all time" like you see here on lemmy.

4chan's /d/ board usually has a very slow but active excessive cum thread. It's also where most of my annoyance with hyper sperm comes from, so go figure. Oftentimes the OP will even specifically request it which kinda ruins the thread for me.

One artist I follow (that I believe is active on that /d/ thread) is pwcsponson. He does mostly hyper (including hyper sperm occasionally 😠), so chances are you'd have the same reaction to the general hyper-ness as with the hyper sperm. I don't for whatever reason, so I like it.

Non hentai/drawn stuff is way harder to find because for whatever reason the tagging is terrible. Creamy Spot on pornhub (and presumably other places) is the one channel I find consistently does it, and like with most real stuff you won't find it by searching "excessive cum". I believe the term I searched to find her was "fake cum"? I barely remember. Hentaied also have a category of videos for this stuff and are more professionally shot, but it's almost too professional for my tastes.

realbooru could potentially be really good because it's got all the functionality of the sites mentioned at the beginning, but everything is so poorly tagged because that's just the pattern with photo/video content I guess 🤷.

Not a special account and not anything I’m into, but for any fetish, Bing Video Search.