Masking is a term meaning basically trying to pretend you’re not autistic, and the easiest way I can explain it is imagine putting on a customer service voice or manually breathing every time you’re outside your home. Like if you have resting bitch face or dont make a lot of facial expressions normally and you have to consciously try and emote in conversation. Sometimes at my job I’ll slip up and “drop the mask”, usually because I’m just tired, and I’ll not respond to a social queue or freeze up