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The uncontrollable back and forth circular motions made by a woman's hips when her man has made her horny but is not there to satisfy her sexual cravings and NEEDS.
My hips undulate when I'm in the saddle, riding you.

My hips undulate wildly when you are far away and we have phone sex. That's phone fucking at it's best.

When you talk naughty to me like THAT, my ass take on a life of it's own, undulating relentlessly while your words make me cum over the phone. I quiver. I convulse, I spasm. I cum. Undulating ceases.
undulate by zazz July 28, 2012
Urban Dictionary Merch
moving from side-to-side or back and forth; rocking, basically the motion a female does when shes riding you
that boat undulates in the water

I like it when she straddles me and undulates
undulate by suprmn90 June 2, 2010
Verb. The act of urination.

Given because of the oscillating motion made by the penis upon the sucessful completion of a piss to dislodge any dewdrops.
The large phallus undulated a stream of hot liquid into her eyes.
undulate by Beaver Muncher November 23, 2004
You probably don't want to know, but it sounds like one of those words you learn in health class. Yeah.
Holy sh!t! How did that undulation end up on the wall!

We had to evacuate the pool because she undulated in it.
Things that would hurt if they kicked you, because they have hooves. HOOVES, DAMN IT.
He's just un ungulate, marg, he can't COOK!
ungulate by unFalln October 13, 2004

unducate 

To do a horrendously poor job teaching.
The California public school system unducated me as a small child.
unducate by typo-definer October 29, 2009

undulating thrum bobber 

An erect penis quivering.
Rob made her squel when he poked her with his undulating thrum bobber.
More from Urban Dictionary

murderhobo 

In a tabletop game, a murderhobo is a player who murders NPCs indiscriminately. This is normally derogatory, referring to a player who totally ignores quests, dialog, backstory, trade, world building etc.

The term is most common with Dungeons and Dragons, but it can be applied to most RPGs where the player is allowed to kill most quest-giving NPCs and NPC traders. E.g. Elder Scrolls, Fallout, Divinity original sin.
DM: The sad little orphan girl tugs at Steve's trenchcoat to get his attention, and ask for help saving her pet dog from...
Steve: I'd like to roll a strength check against strangling the orphan.
Dave: I call dibs on the dog.
DM: You murderhobos disgust me.
murderhobo by Loup&S September 9, 2021
Word of the Day on September 22, 2026
In sales terms, a whale is a prospect that is significantly larger than an organization’s average customer.

Whales are large and extremely difficult to close. Due to their immense size, they are highly sought-after.

A whale is typically identified at first by a whale hunter on the sales team, but often requires cross-discipline participation in order to close; this includes assistance from operations, engineering, creative, client success, and business development teams.
"Shit...the sales director chewed me out on the sales call this morning. He's totally pissed that I have nothing in my pipeline. I've been focused on this one whale for so long that I haven't had time to prospect for normal-sized deals."
Whale by FQ_GFY February 3, 2020
Word of the Day on September 21, 2026

Concrete cowboy 

A guy who thinks he's a country kinda guy, but in reality lives a comfortable city / suburban life.
Eugene: Look at that dude in the cowboy hat!
Todd: He's just a concrete cowboy.
Word of the Day on September 20, 2026
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