Used to be a term for black American soldiers in old USA, now can be used to describe a stoner / pothead who like to smoke the magic herb while listening to reggae music all day long.
Check out Bill here, a truebuffalo soldier. Would be smoking mary jane all day if he could.
The absolute worst thing you can buy at a grocery store. It's COVID times, and still, the shelves are stocked with buffalo hummus. This is even after the toilet paper famine of 2020.
"Hey bro, you seen that new kid? He looks cool."
"No bro, lets go meet him."
"Hey, whatcha eatin'?"
"Buffalo Hummus."
"Yuck man, lets ditch this guy."