to make sloppy errors

sloppy, careless

sloppiness, carelessness / a piece of writing with either unreliable sources or many errors

close friend, bosom buddy / crony, chum

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

in high spirits, in a good mood, excited / spirited, exciting

an excited state

private; mine

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

a personal or private matter / (by extension) selfishness