![3boys 5girls :i ahoge ainz_ooal_gown albedo aqua_(konosuba) black_hair blonde_hair blue_eyes blue_hair broom brown_eyes brown_hair bucket capelet classroom clenched_teeth commentary constricted_pupils crossover detached_sleeves emilia_(re:zero) fan green_eyes hair_rings highres holding holding_broom horns isekai_quartet jacket kono_subarashii_sekai_ni_shukufuku_wo! military military_uniform multiple_boys multiple_girls natsuki_subaru overlord_(maruyama) paper_fan re:zero_kara_hajimeru_isekai_seikatsu satou_kazuma shaded_face shirosame short_hair silver_hair skeleton sneer sweat tanya_degurechaff teeth track_jacket track_suit uniform viktoriya_ivanovna_serebryakov youjo_senki rating:s score:25 post #3540040](/cdn_image/preview/6c/47/6c474a53a44d762cb6bc74c15e1f778f.jpg)
While just as anger inducing as a smirk, a sneer is a sign of absolute contempt. A sneer sends the message that the person sneering believes the target of their ire is so utterly pathetic that they want to laugh. It's an extreme expression and should be used sparingly.
If it's not a smile, use disdain or disgust instead. If the emotion presented is anger or hate, use scowl instead.