When someone puts their two cents in, they are offering their opinion or idea on a particular matter. However, some people may find this phrase overused or too informal. As an alternative, one could say they are sharing their viewpoint, providing input, contributing thoughts, or offering perspective. Other phrases that could replace "putting one's two cents in" include chiming in, adding a perspective, giving feedback, offering a suggestion, or expressing one's point of view. Switching up the terminology can help elevate the level of professionalism in conversation and make one's contribution more meaningful.