Drug Parrots are generally red macaws, bred and trained from birth to sniff out drugs when the drug dogs are unable to find any.
With ancestors having been in South America where the plant that coke is from is prolific, red macaws (and essentially all drug birds) can sniff out coke very well.
So while it may seem like they are chewing on something, they aren’t. They’re just sniffing for drugs.
Nickname given to bales of marijuana thrown overboard or out of airplanes. Origin is reportedly from members of the US Coast Guard in the area of Southern Florida.
"Base we've got some square groupers floating outside of Miami harbor."