The act of taking a shit before going to an event, in anticipation of not having to hold it in uncomfortably for the next few hours otherwise.
"Hey man, you wanna hit up the clubs?"

"I'm gonna take a preemptive strike, then let's hit it."
by Jimothy The 2nd October 16, 2011
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A logical fallacy where claiming something is an "ism" (i.e. racism or sexism, etc) because a person(A) is part of a specific group and not because of specific comments or actions from person(B) towards that person(A).

Related to both "appeal to emotion" and "ad hominem" logical fallacies: By claiming "ism" one party appears as the victim (thus appealing to emotion) while smearing the other party negatively as racist, or sexist, or other (thus an ad hominem attack).
Jane: "Donald Trump interrupting Hillary Clinton during the debate is a sign of sexism."
Dan: "Why?"
Jane: "Well, because she's a woman."
Dan: "That's Preemptive-"ism", Jane."

Greg: "Obama's healthcare plan hasn't worked out too well for him."
Steven: "That's racist!"
Greg: "Why?"
Steven: "Because Obama is black!"
Greg: "That's Preemptive-"ism", Steven."
by Murderton October 31, 2016
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A preemptive hangover is when someone gets the sensation of the hangover they will get the next morning before they have started drinking.
"Woah I was out buying beers for tonight and I just got a preemptive hangover, feels like it's going to be a messy one."
by George W Roberts May 14, 2017
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Verb

To flush the toilet before one is done peeing.

Generally done if one is in a hurry.

Requires extreme skill to save the maximum amount of time- flush it too early, amd you will end up needing to flush again. TOo late, and you have wasted your time.
Preemptive Flush Example:
John, who was late for his college final, attempted to preemptively flush the toilet. Unfortunately, he flushed too early, and had to flush the toilet again. THe extra ten seconds this took caused him to be hit by a bus on his way to the test.
by cr101 December 6, 2009
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When you know somebody is about to say 'Mouse!' to you, and so you say it first and undercut them.
"Hey, James..."
"Mouse!"
Damn! Preemptive Mouse!
by Cyrano "CJ" Jones May 13, 2011
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When you know you are about to blow the bathroom up, so you spray before you do. This helps keep the odor from seeping under the door while you do your business.
About to take a dump. Feels like a bad one. Better preemptive spray so no one else knows just how bad this shit is.
by lillovekitty November 27, 2013
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n. A text sent to a friend whom you are about to visit, alerting them prior to your arrival.
Phil - "Hey guys, we're about to go to Joe's house."
Zeek - "Does Joe know this, or are we just going to show up?"
Phil - "Yeah he knows. I sent him a preemptive text."

Jason - "Wanna' go to Steve's?"
Ralph - "Sure, but let him know or he won't answer the door."
Jason - "One preemptive text, coming up!"
by Stickboy142 August 12, 2011
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