What does "pumping" mean?

[NewHopeR]

Context:

[h=1]'Jersey Shore' cast, including Snooki and The Situation, to be replaced for MTV show's third season[/h]
BY SORAYA ROBERTS
DAILY NEWS STAFF WRITER
Wednesday, May 12, 2010

All the fist pumping in the world can't keep the old "Jersey Shore" cast in line.
Casting director Doron Ofir told BlackBook magazine that the MTV series' entire cast will be replaced for the third season of the show.
Ofir does not specify why Snooki, The Situation, JWOWW, Pauly D, Sammi and Ronnie have jumped ship, but money could be a factor.
The cast reportedly demanded pay rises when "Jersey Shore's" first season became MTV's highest-rated series. In season two, they received a $10,000 signing bonus and $5,000 per episode.

 

[SirGod]

* Not a teacher

Take a look at fist pump:

Fist pump - Wikipedia, the free encyclopedia

 

[NewHopeR]

* Not a teacher

Take a look at fist pump:

Fist pump - Wikipedia, the free encyclopedia

Thank you.

According to the definition, I get "All the fist pumping in the world can't keep the old "Jersey Shore" cast in line" as "All the welcome gesturein the world can't keep the old "Jersey Shore" cast in line". Do you agree with me?

 

[SirGod]

Thank you.

According to the definition, I get "All the fist pumping in the world can't keep the old "Jersey Shore" cast in line" as "All the welcome gesturein the world can't keep the old "Jersey Shore" cast in line". Do you agree with me?

It is not really a welcome gesture. It is a gesture you make when you celebrate something (e.g. victory), you are happy that you did it and usually you achieved it. For example: after you pass a hard exam, when you score in an important football match etc.

Take a look at this:

TYF Instructional Fist Pumping Video - YouTube

And you will get it.