I've seen the Deadpool movie, but don't have any knowledge of or experience with any of the comics.
What I noticed is that the film appears to set "Maximum effort" up as a catchphrase of sorts. I can recall at least three instances where the phrase was used:
At the start of the film, where Deadpool says it shortly before dropping off an overpass and through the sunroof of a moving car.
Towards the end of the film, where upon realizing that he has no firearms Deadpool says something to the effect of "we'll just have to do this the old-fashioned way, with two swords and maximum effort".
Even further towards the end of the film, when he's struggling to throw/detach the O2 deprivation chamber.
What's not clear to me after watching the film is if the catchphrase is being played straight, meant to be taken ironically/as a lampshade whenever Deadpool does something that's only possible because the plot requires it, or a reference to an inside joke that only people who have read the comics will get. Which is it?