As an interjection shup
is (uk|slang).
As a verb shug is
(uk|dialect|obsolete) to writhe the body so as to produce friction against one's clothes, as do those who have the itch.
shup
English
Interjection
(
en interjection)
(UK, slang)
- - That shirt looks well bad.
- - Shup mate!
shug
English
Proper noun
(
en proper noun)
A Scottish nickname usually applied to people with the first name Hew or Hugh or other spellings of this name.