from Wiktionary, Creative Commons Attribution/Share-Alike License
- adj. Talkative: inclined to talk much; inclined to shoot one's mouth off.
- n. An act of fellatio.
- adj. Marked by the presence of gobs (lumps).
From gob (mouth) + b + -y. The meaning "inclined to talk" is probably related to gabby. (Wiktionary)
From gob (lump) + b + -y. (Wiktionary)