friend code
A unique numeric identifier used on Nintendo platforms (e.g., Nintendo Switch, 3DS) to add friends online.
Let's exchange friend codes and play a game together.
Where can I check my Switch friend code?
Variant with interpunct; less common but seen in some official materials.
Wasei-eigo (Japanese-made English) from 'friend' + 'code', referring to the numeric identifier used on Nintendo consoles for adding friends.