(chest-b'o'-ner) n. 1. An erection usually found near or around the prominent upper chest of a human aged from 5-40 years of age. 2. An insult expressing ones inferior masculinity complex and their means of coping. Their appearance is hostile and defensive, and they constantly try to prove their masculinity and act as though they wear their "boner" on their chest. 3. Any negative situation or person. When used in play it is harmless and inoffensive.
"Did you see that jock tryin' to look manly? He was being such a chestboner."
"In an attempt to impress a girl, the effeminate 17-year-old boy puffed out his chest, put a bundled-up sock in his underpants, and proceded to insult her current boyfriend. What a chestboner."