I. sulk 1 /sʌlk/ BrE AmE verb [intransitive]
[ Date: 1700-1800 ; Origin: sulky ]
to be silently angry and refuse to be friendly or discuss what is annoying or upsetting you – used to show disapproval:
Nicola sulked all morning.
II. sulk 2 BrE AmE noun [countable]
a time when someone is sulking
in/into a sulk
Mike could go into a sulk that would last for days.
She’s having a sulk.
the sulks
a fit of the sulks