1) A counterproductive mindset that creeps into your system throughout a day. 2) When you are too drunk and horny for your own good.
1) Employer ", Hey Bill, are you going to start working? It's fifteen minutes past break time."
Bill ", Sorry sir, but I'm gonna sit here and read this Auto Trader. Got me a case of the fuckitts.

2)Friend ",What were you thinking James? She was a 4, and a soft 4 at that."
James ", YOU'RE JUST BITCHIN' CAUSE WE DID IT IN YOUR BED!...... sorry man, it's the fuckitts talking."
by hazzel January 11, 2014
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A component found in import-manufactured vehicles that is unidentifiable to even the most experienced of mechanics. All that is known is that the component is not an air-metering sensor (such as a MAP or MAF), it is not a purge valve, nor is a temp sensor, but it run back to the main wiring harness where the end connections are completely unidentifiable.

Often found next to the thingy-ma-jigger, but below the do-hickeys.
Now, we rewired the do-hickey, packed the bearings, replaced the hoosits, and flushed out the do-dad, but we still haven't figured out what to do with the whatcha-ma-fuckitt.
by Coug737 November 03, 2018
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