Letters that make mug up
g, p, m, u are letters that make 'mug up'
gum up is an anagram of 'mug up'
1 possible definitions for 'mug up'
Under this definition, mug up is a verb and has the following properties:
grind away, bone up, swot up, drum, swot, get up, cram, bone have the same meaning as 'mug up'
'mug up' can be a type of study, hit the books.
cram is a verb group of mug up.