Last Word Becky Share definition Flag A person who feels the uncontrolled drive to always get the last word in a conversation. Rebecca is so irritating. Even though she is wrong, she always feels the need to be a Last Word Becky. Last Word Becky by darksidedan April 14, 2021 0 0 Get merch Get the Last Word Becky mug. Buy Now — $32.95 See more merch