The spraying of Deep Heat onto the testicles. A proper night-time chubbing requires a number of key roles. Least popular was the pulling down of the pyjamas, indifferent was the variable number of team members required to pin down the victim, and most prestigious was the chubber himself, who delivered the chub unto the naducles. This can go wrong (or spectacularly right, depending on your level of sadism and optimism) if the victim is allergic to Deep Heat.

read the last line

YOU BENTSHOT!

i dont think we called it chubbing, or even had a name for it, although, in retrospect, i suppose it could be termed a 'stealth chub'. you simply make an excuse to go to the toilet during PE, sneak back into the empty changing room and empty half a can of deep heat into the gusset of your chosen victims new underpants. about 2 minutes after they have dressed they gradually become disabled by an immense surging glow of genital burning! jocular hilarity for those 'in the know'. ps; you can't sniff your pants to check before getting dressed, otherwise you will inevitably be accused of being a bentshot or having a zionist persuasion!