To increase the size of something, especially to unusual proportions(verb)
Wiktionary.org : Text is available under the Creative Commons Attribution-ShareAlike License
Use "supersize" in a sentence
"The term supersize is a marketing technique, which was coined in the mid-nineties by a McDonald’s executive to boost sales."
"Stephen Green, another Standard Chartered economist, said Friday that Beijing might "supersize" the stimulus spending plan by four trillion to six trillion yuan, bringing the total to between eight trillion and 10 trillion yuan."
"Why else would they come up with fake verbs like "supersize" and "biggie size"?"