Usually a girl, but can be a guy, who attaches herself to a guy or faux friends who have plenty of 420, just so she can suck on the bong and get high. The Bongsucking Leech has no money and contributes nothing to
the party, so to speak, may not even be cute, but will
sometimes perform sexual favors or do errands to
work off some of the leech-ery in trade.
That pink-haired chick is such a bongsucking leech, she is just using him for his weed. She even admits it behind his back. Now I think she's even moved in
with him and cleans his
apartment and cooks just so she can
get high now.