1. an unpleasant or ugly person.
|‘Miuzi Weighs a Ton’ [lyrics] You know the ducks used to criticize my every phase of rapture.|
|Street Talk 2 37: She used ta be a real duck but now she’s too cold!|
2. (US campus) a silly person.
|Campus Sl. Oct. 2: duck – someone who is acting really stupid.|