Colloquial expression meaning to heat something in a microwave (to nuke/heat up quickly in the microwave).
毎朝、冷凍ご飯をチンして食べる。
Every morning I microwave my frozen rice and eat it.
そのスープ、ちょっとチンしてもいい？
Can I heat that soup in the microwave for a bit?
電子レンジでチンしたら、フタが飛んで中身がはねた。
When I microwaved it, the lid popped off and the contents splashed everywhere.