pop up

Verb

intransitive idiomatic informal transitive

(intransitive) To come up with a "pop" sound. / (intransitive, informal, idiomatic) To appear without warning. / (intransitive) (Of an alert, advertisement, etc.) To suddenly appear onscreen.

Japanese Meaning

（音として）ポップという音を伴って現れる / 予告なしに突然現れる / 警告や広告などが画面上に急に表示される

What is this buttons?

When you open the champagne, the cork can pop up with a sharp sound.

Google Translation / DeepL Translation

シャンパンを開けると、コルクは鋭い音を立てて飛び上がることがある。

Details

Sense（1）

(intransitive) To come up with a "pop" sound.

The toast is in the toaster - when it pops up it will be ready.

Google Translation / DeepL Translation

Details

Sense（2）

(intransitive, informal, idiomatic) To appear without warning.

Across Japan, technology companies and private investors are racing to install devices that until recently they had little interest in: solar panels. Massive solar parks are popping up as part of a rapid build-up that one developer likened to an "explosion."

Google Translation / DeepL Translation

Details

Sense（3）

(intransitive) (Of an alert, advertisement, etc.) To suddenly appear onscreen.

[…]where you should put the disclaimer for software (somewhere that the user sees it when they start the program, tho' I wouldn't do that, just put it in the 'about' box like the mpgn.com guy suggests -- otherwise, having something pop up makes it annoyware, IMHO).

Google Translation / DeepL Translation