1. n. an obnoxious person. (Rude and derogatory.) You silly birdturd. Wake up!
2. mod. stupid; obnoxious; lousy; worthless. (Usually objectionable.) Of all the stupid, underhanded, birdturd tricks—this takes the cake!
3. n. bird dung, especially if dried. (Usually objectionable.) There’s birdturd on your shoe.