Unintentional Rhyme
When you're talking to a single person, or a group of people (even worse) and you accidentally say two words (at random points during the sentence) that rhyme. Essentially, it causes you to involuntarily look like a stupid asshole that likes to rhyme stuff all the time because it's "funny" and "witty".
Actually O.K. guy: "Hey girl, you want to go spend this sunny day by the bay?
Hot (probably stupid) girl: "What? You're so dumb lulz"
A.O.K. Guy: *dammit unintentional rhymes!*
Hot (probably stupid) girl: "What? You're so dumb lulz"
A.O.K. Guy: *dammit unintentional rhymes!*