What the doctor in "Rocky Raccoon" is in relation to gin after 8 takes.

n. The birth name of somebody who has changed their name. Most commonly attributed to trans people, but can be attributed to any person who has changed their name. (sometimes written as two words: dead name)

v. 1. To call somebody by their deadname.
v. 2. To out somebody's deadname to the public.

When a member of the Beatles is thinking of or making a new song, or thinking in general

the act of simultaneously smoking and drinking.

smiling and winking at the same time, while while having sex with a female(s) in the ass as she looks back at you