What does pump mean
 

Pump - What it means: “Let's say you train your biceps. Blood is rushing into your muscles and that's what we call The Pump. You muscles get a really tight feeling, like your skin is going to explode any minute, it feels fantastic. It’s as satisfying to me as coming is, you know?” Arnold Schwartzenegger. Righto then.

"Coming," or "cumming" ? :D

arnie like to make things sound better than they are its hes abilty
it made people stand and notice and maybe think dam i need to get that pump
still love the original pumping iron must of watch ten times when first started lifting