Definition

Danish slang meaning 'full on' or 'going all out'—used to describe someone who's fully committed, all-in, or taking something to an extreme level.

Example Usage

Han er fuld på når det kommer til gaming; han spiller 24/7.

Source: Urban Dictionary (https://www.urbandictionary.com/define.php?term=Fuld%20p%C3%A5&defid=16846266)