pack on
verb1
Informal To add (fat, muscle, etc.) so as to increase mass or bulk.
- Most strength coaches agree that to gain an inch on your arms, you have to pack on at least 10 pounds of body mass.2006, Joel Marion, Men's Fitness, Dec/Jan, p. 102
- The nine males packed on so much fat their weight increased to more than 700 grams.2010 October 21, Margaret Munro, “Dad's eating habits weigh heavily on offspring: study”, in Vancouver Sun, Canada, retrieved 13 Nov 2010:
- Derived terms
- pack on the pounds