Wordnet 3.0
VERB (1)
1. 
 be behind; 
 approve of; 
- Example: "He plumped for the Labor Party"- Example: "I backed Kennedy in 1960"[syn: back, endorse, indorse, plump for, plunk for, support]
WordNet (r) 3.0 (2006):
plump for
    v 1: be behind; approve of; "He plumped for the Labor Party"; "I
         backed Kennedy in 1960" [syn: back, endorse, indorse,
         plump for, plunk for, support]