Sack

Sack means something is 'Too much effort' or 'Something you do not want to do'.

Originated from Killara High School in Sydney's sunny Upper North Shore.

Teacher: "Class please can you write a practice essay on Module A, and use the practice examples on the google slide. Make sure to send this by Wednesday 5:00 PM.

Kid in the back: "Sack!"

Another kid: "SAAAAAAACCCCKKK!"