Characterized by erratic changeableness or instability, especially with regard to affections or attachments; capricious.(adjective)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "fickle" in a sentence
"The word fickle give me that big pickle baby come on now you know you want to come on come on come on, oh yeah, yeah, yeah, baby!"
"Instead the sense was that the mood of the crowd could change rapidly; the word fickle is used in the definitions."
"How many people does that happen to in the so-called fickle word of fashion."