To hustle or to give great effort
“We’re back in the game thanks to his reverse sandbagging.”
“I have mastered the art of the reverse sandbag”
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.
Pretty self-explanatory...
A nutsack
My girlfriend cheated on me so i punched the guy in the turkish sandbag