It's a "meme" stemming from Blue Archive community, where they describe younger character as "cute and funny" which shorten to "cunny" which is a slang word for little girl genitalia. Often with crying emoji. Since then it spread to other gacha, anime and gaming communities.
Eww. That's gross and annoying.
Think reversing the order would be enough to avoid the association? Funny and cute flows better, to my ear, anyways. Not sure why though, since lists like that are usually alpha order? Maybe it's because cute has a harder ending, while funny has a softer ending and similar consonants to and?
Also made even more disturbing by some of them not separating reality and fiction, where it goes further than them liking specific anime-style characters. That and this particular type of BA fan tends to be the male self insert ones that harass anyone that ships the girls with each other, as they tend to be bigots that are openly homophobic and also transphobic/misogynist/racist. Usually they're far right, to the point that some of them openly call themselves nazis. The worst all around on many levels.
Somehow, that is completely unsurprising.