Confirm 5 gram/grams is a phrase used by people who witnessed someone acting in an odd manner. It could be but not necessarily when someone is intoxicated off stimulants. This phrase originated when someone smoked 5 grams of crystal methamphetamine at the void deck and started being aggressive while being shirtless and masturbated to passersby. Confirm 5 Gram could also be used when someone is suffering from mental illnesses though this phrase is not commonly used for that reason. People called Confirm 5 Gram are usually gone case individuals without a bright future and most likely is rotting their life away from narcotics. You could find majority these individuals being called "confirm 5 gram" at vicinities such as Punggol, Boon Lay, Yishun, Redhill, Kallang and Aljunied
Billy: woah look at that YP throwing a fit and raging, he even got shirtless and started wanking!
YP: ARGHHHHH *wank* *wank* *wank*
Kendrick: bro that guy confirm 5 gram sia
Billy: yea kendick, maybe even 10 gram