Slipped my mind

[Pupil]

Test No. incompl/inter-40 "Do you mind?", question 9

There, I knew there was something I had to do today and now it's completely ......... my mind.

(a) slid
(b) glided
(c) sailed
(d) slipped

Test No. incompl/inter-40 "Do you mind?", answer 9

There, I knew there was something I had to do today and now it's completely slipped my mind.

Correct answer: (d) slipped

Hello Alan! I don't know the expression "slipped my mind"
Thank you
Pupil
_________________
the more we learn
the less we know

[Alan]

Hi,

This means simply 'I forgot'.

Alan
_________________
English as a Second Language
You can read my ESL story Indirect Speech

[Flopistols]

can you give me another example using that expression? so i can understand the meaning well...
thanks in advance!