Here's the deal ... the "Friday" star is teaming up with Pineapple Express, a company that delivers medical and recreational marijuana in Los Angeles, and he's dropping off dank to some very lucky stoners.

Pineapple Express is holding a contest this month, and each Friday they randomly select 4 winners from the sweepstakes and those potheads get a special delivery from Deebo!!!

The best part ... Tommy drops off the goods precisely at 4:20 PM, which as you know, holds a special place in the hearts of pot smokers across the globe.

Legal marijuana businesses have been deemed essential in L.A. so they're still operating despite shelter-in-place orders during the coronavirus pandemic ... and Pineapple Express says Tommy's gonna take extra precautions during his deliveries.

Finally, someone who actually wants to see Deebo pull up on a bike!!!