Search Result for "act up":
Wordnet 3.0

VERB (2)

1. misbehave badly; act in a silly or improper way;
- Example: "The children acted up when they were not bored"
[syn: act up, carry on]

2. make itself felt as a recurring pain;
- Example: "My arthritis is acting up again"



WordNet (r) 3.0 (2006):

act up
    v 1: misbehave badly; act in a silly or improper way; "The
         children acted up when they were not bored" [syn: act up,
         carry on]
    2: make itself felt as a recurring pain; "My arthritis is acting
       up again"