implausible

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

implausible by wrskft June 30, 2007

implausible speculation 

Frivolous musing. Legal term for senseless argument.

The Appeals Court dismissed the defenses argument as implausible speculation.

implausible speculation by mlhiss October 7, 2020

implausible speculation 

Frivolous musing. Legal term for senseless argument.

The Appeals Court dismissed the defenses argument as implausible speculation.

implausible speculation by mlhiss October 7, 2020

implossible 

A word used when the term impossible simply isn't good enough. A new level of impossibility that is physically not possible in the past, the present or the future.

John: TODD, I'VE INVENTED COLD FUSION!

Todd: WHAT, THAT'S IMPLOSSIBLE!

implossible by AaronMosh7 February 24, 2011