Wordnet 3.0
VERB (1)
1. 
 cause to become unblocked; 
- Example: "The medicine unstuffed my nose in minutes!"[syn: unstuff, loosen up]
WordNet (r) 3.0 (2006):
unstuff
    v 1: cause to become unblocked; "The medicine unstuffed my nose
         in minutes!" [syn: unstuff, loosen up] [ant: block,
         choke up, lug, stuff]