Yaoi Hands, also known as "Yaoi hand syndrome", is a term for aggrandized hands that can be found in Yaoi, a homoerotic fictional media intended for female consumption. The trope bears similarities to several other anime devices, including exaggerated breasts and gag boobs

It is basically a term for making fun of abnormally large hands in artwork, which is largely common in Yaoi media, but can be used for non male/male posts, as it simply means "ginormous hands".