A frund is someone who people would perceive to be your best friend from the outside but actually you are in a secret and most likely very passionate love affair.
by underwateroctopus September 03, 2016

by Mouse frunds May 18, 2018

A FRIEND or buddy that you go on RUNS or exercise with. A great motivator/pacesetter who can help you reach your goals and exceed physical limits. It's always safer to go take a Frund along too!
by jeshhhy November 03, 2015
