a metaphor for describing an excess of THC in your system. usually said after doing a lot of marijuana, or continuous usage of marijuana
"so you've gotten high everyday for the last passed two weeks?"
"YEAH BRO, I GOTS GREEN BLOOD"
DOCTOR: "Sir, i'm afraid to tell you that you have green blood"
MAN:"haha yeah, gettin' high errday buddy"
DOCTOR:"hook me up with some of that dank shit yo"