g, p, m, u are letters that make 'gum up'
gum, up, GU are words within 'gum up'
mug up is an anagram of 'gum up'
1 possible definitions for 'gum up'
Under this definition, gum up is a verb and has the following properties:
'gum up' can be a type of congest, choke, back up, choke off, foul, clog, clog up.