レンジアップ

noun, noun or participle which takes 'suru'

microwaving; heating in a microwave

Wasei-eigo from 'range up'; used colloquially for the act of microwaving food. Often used as a suru-verb.

wasei-eigo (Japanese-coined English), from range up

• 冷さめたおかずをレンジアップして食たべた。

  I microwaved the cold side dish and ate it.

• レンジアップすればすぐ温あたたまるよ。

  If you microwave it, it'll heat up right away.