Someone who spends more time in quarantine than they do in work.
Nunnsy came back from another weekend away into yet another 2 week quarantine, making it 8 weeks out of 12, earning him the title of the "Quarantine Queen"
A common British army term, usually heard when someone is "spinning dits"
As Nunnsy started spinning dits, the colleague will urge others to "pull up a sandbag" as this story might take a while and will spiral off topic.