Top Definition
adj. the antonym of plausible
since plausible means 'seemingly probable', implausible is the exact opposite which is 'dos not seem very probable'
"sorry I have to put down the phone because i need to scratch my nose with both hands" is an implausible excuse
by wrskft June 07, 2007

Free Daily Email

Type your email address below to get our free Urban Word of the Day every morning!

Emails are sent from We'll never spam you.