I haven't encountered any weird smelling herb, but I have had a few weird tasting ones.

My buddy smoked me up with this shit ass herb and it tasted like nachos. I shit you not! It was crap too.
Nochowderforyou Reviewed by Nochowderforyou on . Experienced some weird and fascinating smells from weed...let the world know! Weed has a variety of different smells...from woody to sweet to fruity to dirt! This is definitely the best of God's creations next to a nice woman and pussy and of course (for us men)...our "units". Here's what unusual scents I have smelled from some good ass FIRE ganja 1). Cat-food (the blended ingredient kind) 2). Straight candy. I don't just mean sweet and fruity, I mean the shit smelled like straight up sweet jolly ranchers. Rating: 5