As a noun dalk
is a pin; brooch; clasp.
As a verb dack is
to pull down someone's trousers as a practical joke.
dalk
English
Etymology 1
From (etyl) dalke, dalk, from (etyl) .
Noun
(
en noun)
A pin; brooch; clasp
Etymology 2
Perhaps a diminutive of (dale), (dell).
Alternative forms
*
Noun
(
en noun)
A hollow or depression.
*1969 , Vladimir Nabokov, Ada or Ardor , Penguin 2011, p. 120:
*:On a sunny September morning, with the trees still green, but the asters and fleabanes already taking over in ditch and dalk , Van set out for Ladoga, N.A.
dack
English
Verb
(
en verb)
(Australia, informal) To pull down someone's trousers as a practical joke.