Today's new concept is

AD-jacking a word based on "AD" (for advertisement) for prefix and "-jacking" (same idea is hijacking, carjacking etc...).

Means : benefiting from another advertisement.

That is, your ad reuse a word, concept or element of language introduced to the audience by a previous advertisement, thus benefiting from it in terms of time. Anything known by your audience does not have to be explained by your own ad, making it shorter than in the opposite case.

Alternate syntax : adjacking, ADjacking, ADJacking

First references I get from googling it refer to hacking with online ads using XSS techniques.
So I might have invented this term.