Definitions of blow up:

• verb:   make large

  Example: "Blow up an image"

• verb:   fill with gas or air
• verb:   exaggerate or make bigger
• verb:   get very angry and fly into a rage
• verb:   to swell or cause to enlarge, "Her faced puffed up from the drugs"
• verb:   cause to explode
• verb:   add details to