What is Sack It Off?
1.
A phrase in place of 'give it up' or 'forget about it'. It has even been used in place of 'can't be bothered'.
Q-Do you want to do some work today?
A-Nah, sack it off.
Q-They've already gone. If we left now, we could probably catch them up...?
A-Nah, sack it.
See
2.
to deliberately not do something/ to avoid something/ the act of ditching a person or thing.
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variations: sack it/him/her off, sacking off.
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A: wats good? wanna come cotch at mine?
B: cant, got an essay to do and some reading aswell, long.
A: sack it off - we'll smoke a joint and play pro instead.
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A: Alex knew we were leaving at 7 where the fuck is he?
B: Allow it, sack him off we're going.
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I've been a wasteman, sacking off all day.
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A: you do your homework?
B: allow it, i sacked it off.