(Internet slang) (one) outside of a Twitter user's mutual follower group

participation, commitment

to participate, to join, to enter

(the) outside

(chiefly women's speech) first person singular pronoun: I, me

外, 他: other, the rest

(polite) first-person singular pronoun: I, me

a personal or private matter / (by extension) selfishness

(formal) first-person singular pronoun: I, me

personal, private / secret