A last name, just like deadname, is last name, that isn't used anymore by a person, and can be used by both cis and trans people for private reasons(e.g. past)
Person A: Ohh, so that's their deadlastname?
Person B: Yes, but please, use their current lastname. They are very uncomfortable with their deadlastname
Person A: Alright!/gen
“I have like 4 pairs of jeans in my closet that don’t fit anymore, but I know after this diet I’m going to fit in them again.”
“George, those are your deadpants. Let go of them and embrace who you are now.”
slip of the tongue perhaps,
Those idiots who drive around in a ridiculously raised pick up truck, making a top heavy vehicle even more top heavy and unstable
A:*gah*
B: "Whats the matter"
A: This dam prickup is blinding me.
B: Stupid thing's, as if there lights weren't blinding enough as it is.