As verbs the difference between dack and gack
is that dack is (australia|informal) to pull down someone's trousers as a practical joke while gack is to make a 'gack' noise.
As an interjection gack is
(often|repeated several times) the sound of a cat coughing up a hairball.
dack
English
Verb
(
en verb)
(Australia, informal) To pull down someone's trousers as a practical joke.
gack
English
Interjection
(
en interjection)
(often, repeated several times) The sound of a cat coughing up a hairball.
Also used of similar noises, particularly one made to show disgust or disapproval.
Verb
(
en verb)
To make a 'gack' noise.
To expectorate a hairball.
