noun, noun or participle which takes 'suru'
full completion; fully completing a collection
Wasei-eigo abbreviation of 'full complete' or 'full completion'. Used in hobby and gaming contexts for collecting every item in a set or achieving 100% completion. Often used as a suru-verb (フルコンプする).
wasei-eigo (Japanese-coined English), from full comp
このガチャ、フルコンプするのにいくらかかったと思う？
How much do you think I spent to fully complete this gacha set?
全キャラのフィギュアをフルコンプした。
I completed the full collection of figures for all characters.