activity partner 

A person with whom you form a special bond because of the common interest for a specific activity.

A person with whom you get ritually together to perform a specific activity.

I’m not looking for a friend, just an activity partner.

activity partner by Paul Ross September 29, 2006

Activity Partner 

Someone to do activities with like tennis, biking, jogging, etc. An activity partner can also be synonymous with dating.

I met this woman on a dating site and we play tennis regularly. We are activity partners.

Activity Partner by noname2010 June 14, 2010