The phrase "proud sponsor" is a term used to describe an organization or individual that has contributed financial support, resources, or other forms of assistance towards a particular event, cause, or project. The word "sponsor" implies a level of commitment and investment in the success of what is being supported, while the adjective "proud" suggests a sense of satisfaction and honor in being associated with the initiative. In essence, the phrase conveys that the sponsoring entity takes great pride in their involvement and contribution to the cause or event they are supporting.