mug up

US /mʌɡ ʌp/
UK /mʌɡ ʌp/
"mug up" picture
1.

to study a subject quickly, especially before an exam

:
•
I need to mug up on my history before the test tomorrow.
•
She spent the whole night mugging up for her finals.
:
cramswotbone upbrush up
:
muga mug's gameon the up and upupup tocome up withfollow up