This Particular “Tid-Bit” is from the GiveMeSomeEnglish!!! – Lexis Portal and expanded here for Your English Learning Experience, and for the sake of The Proliferation Of Awesomeness, World-Wide… which is, in fact, The Prime Objective of GiveMeSomeEnglish!!!) 😉
The most common use of this term is in its Noun form — referring to those types of advertisements that appear suddenly on your computer screen, when you don’t have an ad blocker installed on your computer — or the error messages you get when you are not smart enough to finally get rid of Windows and switch to Linux already.
(not a real “Pop-Up”)
In the Noun form, the term should be hyphenated to indicate that it is a “thing” rather than describing an action. This is not a “rule” of English Grammar, but it is in The Common Tongue, because… well… it just makes a hell-of-a-lot-of sense. 😎
In the Phrasal-Verb form, this can be used to refer to:
These can be the ideas that seem to appear in one’s mind or imagination, sans actually having been consciously produced by the person intentionally.
. The term can also be in reference to a situation occurring with no prior notice, and often coming as a bit of a surprise.
This could be things like…
As a final note, it should be mentioned that the Phrasal-Verb form is not nearly as common as the Phrasal-Noun form. But when used in the Phrasal-Verb form, it is usually used in its separable form. For example…
And That’s That!
Have An Excellent Day!