A person who has taken too many drugs in too short of a time period to the point where it significantly alters their personality for a few years.

Term was coined in north Wales in the 90s by local ravers.
"Dude I swear Kevin is one mushroom trip away from black eagling"

"I haven't seen Derek in years, i think he went black eagle after taking too much MD"
by Tecwyntractor July 22, 2022
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