People used to abuse the gas propellant in whipped cream cans, I believe it used to be nitrous oxide, or laughing gas. They probably just changed the propellant gas.
What Are Whippets? (webmd.com)
Whippets, or nitrous oxide, are popular “party” inhalant drugs. You may also hear them referred to as “whippits” or “whip-its.” The drug gets its name from whipped-cream aerosol canisters that people open to misuse the gas inside. These drugs create a high that lowers your mental and physical pain.