pile on the pounds

pile on the pounds (third-person singular simple present piles on the pounds, present participle piling on the pounds, simple past and past participle piled on the pounds)

1. (informal) Of a person: to gain weight quickly.
   • 2020 November 18, Paul Bigland, “New infrastructure and new rolling stock”, in Rail, page 51:

     The line is single track as far as Halesworth, but many of the stations retain their original buildings - including refurbished Beccles, which boasts a station cafe and community rooms. The same is true of Wickham Market and Woodbridge stations. You could easily pile on the pounds with a 'cafe crawl' along this line!