put some timber on

put some timber on (third-person singular simple present puts some timber on, present participle putting some timber on, simple past and past participle put some timber on)

1. (UK, slang, intransitive) To put on weight; to become more heavy or obese.
   • 2015, Keith Lemon, Keith Lemon's Big One:

     Most of us will probably go on to have boring jobs but one day I'm probably gonna have me own company and you'll go on Facebook and tell people ya went to school with me. I'll message ya back and I'll say 'yeah I went t' school with ya and din't we have a great time', whilst all along I'll be finking 'cor, you've put some timber on.'