When person(s) go looking for metal (a lot of the time, it occurs between 11pm-5am) to take to the scrap yard for money $.
Fools yelling across yard to each other:
"Hey man, you ready to go metall'n ?!?"
"Ya, let's go!"
Metall'n
To go collect/gather scrap metal (to later take & sell/cash in @ a junk/scrap yard) most of the time, collecting is done during the "grave yard" shift hours.
Example: "What did you do last night?"
"Nothin much. Went metalin for a lil' bit "
Metall'n