pop up

Found in Anh - Anh (Wordnet)

Definition Verb (intransitive) : To appear suddenly or unexpectedly, often in a surprising or quick manner. To occur or arise, especially in a context where it was not previously present or obvious. Usage and Examples Verb : A new problem popped up just when we thought the project was finished. The notification popped up on my computer screen. He has a habit of popping up at the most unexpected...