Dictionary.com
Thesaurus.com
Showing results for under one's belt. Search instead for under-one-s-belt.

under one's belt

Idioms  
  1. Experienced or achieved, as in Once a medical student has anatomy under her belt, she'll have much less to memorize. This metaphoric expression likens food that has been consumed to an experience that has been digested. [Colloquial; first half of 1800s]