Rihanna Let's Be Blunt ... The Chick Loves Big Weed

6/23/2013 12:47 AM PDT

Rihanna is training for the weed Olympics, and it looks like she's got a shot at the medal.

RiRi's clealry impressing the fine folks in Amsterdam -- and that's no small feat.  She posted these pics Saturday night on Instagram.

Judging from the foot longs ... if Rihanna was generous the entire country is pretty much wasted this AM.

So what else can she fit in that mouth?