The phrase "to pump up" means to increase or enhance something, often through encouragement and motivation. It can also refer to physically exercising in order to build muscle strength.
I exercise my legs at least once per week — unlike bodybuilders who might do two or more leg routines each week trying to get pumped up for competition. (how-to-prevent-pre-diabetes.com)
Let's cure our end - of - summer - blues and get pumped up for Fall with some stunning editorial shots! (greylincollection.com)
I find pumpkin to be bland unless it's really pumped up with spice, so I used quite a bit of pumpkin pie spice and a pinch of stevia for sweetness. (beamingbanana.com)