Fluster/ˈflʌstər/ Definition 1 of 2Pro Tip 1/3Social Situations Use 'fluster' to describe someone's reaction to embarrassing or unexpected social interactions. He was flustered when he couldn't remember her name. Pro Tip 2/3Temporary State 'Fluster' generally implies a temporary loss of composure, not a lasting trait. She was flustered during the interview but later relaxed. Pro Tip 3/3Sudden Change The word 'fluster' suggests a quick shift from calm to nervous due to a specific event or pressure. The pop quiz flustered the entire class.