Use of "slip"

[Ofelia]

English Synonym, Elementary Level

ESL/EFL Test #72 "Synonyms for mistake and error", question 7

Whose ......... is this? Yours, I'm afraid.

(a) blunder
(b) slip
(c) fault
(d) error

English Synonym, Elementary Level

ESL/EFL Test #72 "Synonyms for mistake and error", answer 7

Whose fault is this? Yours, I'm afraid.

Correct answer: (c) fault

Your answer was: incorrect
Whose slip is this? Yours, I'm afraid.
_________________________

hello, I would like to know what is the correct use of "slip".

thank you
ofelia

[Conchita]

A slip is, among other definitions, a (usually slight) mistake or error, caused by carelessness:

I made a slip when I was writing the cheque.

A slip of the pen/tongue is a small mistake in writing/speaking.