When referring to brainstorming, there are many synonyms for the phrase "kicking ideas around." Here are a few alternatives: "spitballing," "tossing around concepts," "batting around suggestions," "hurling ideas back and forth," "juggling thoughts," "bouncing around possibilities," "throwing out propositions," "churning out proposals," "shooting the breeze on ideas," "playing with thoughts," "firing off ideas," and "swapping notions." All of these phrases evoke the idea of a group of individuals collaborating to generate new and innovative ideas, communicating and building upon one another's suggestions to achieve a common goal.