Snoop Dogg -- Smokes Out Hotel Room ... Firefighters Race to Scene

Snoop Dogg took the meaning of hotbox to a whole new level Thursday night ... when he smoked out his Australian hotel room so intensely, firefighters RACED to the scene thinking there was a real fire!

Here's what went down ... cops say "smoke from an unidentified source" triggered a fire alarm around 10am ... and firefighters who happened to be in the hotel rushed up to the scene to investigate the situation.

But when they got to the room, the firefighters quickly realized there was no fire ... just a ton of smoke (duh, it's Snoop) ... though officials won't say if weed was involved.

Once the situation calmed down, Snoop actually took some Instagram pics with the responders ... and talked about how he always wanted to be a firefighter.

He does enjoy getting blazed.