full pelican

To do something to the extreme, bigly, hard as a mutha.

A pelican can hold about 3.5 kg of fish in its stomach and about 11 kg in its pouch. A pelican going "full pelican" would have 15 kg of fish on board.

Brian: Hey dude, any bigfoot sightings lately?
Other Brian: Hell yeah! We crossed paths this morning. Dude is going full pelican on growing out his hair.