A non legitimate THC cartridge/cart that has been filled by hand and sold cheaply for profit; tends to have lots of pesticides hence the name pesty.
Duuude try this new cart I just got it’s gas...”

“No dude that’s a pesty I don’t want lung cancer
by Hexoid April 26, 2019
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Pesty is the most gay unicorn ever. He is so gay. He loves crack. And your mom.
by Naffie Laffie Taffie August 12, 2011
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When a door-to-door pest control salesman acts like your best friend to sell you shit you don't need to the extent that they become a pest themselves: they're a pestie.
Oh look, I've got another segway-riding pestie at the door.
by unexpected_romba March 24, 2020
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An annoying door to door pest control salesman trying to sell you his overprice service.
That pestie guy tried to overcharge me.
by Valuefighter March 24, 2020
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When your best friend is your poop buddy, they're your Pestie
She's my Pestie, back off
by Fxsstjknkogdzcv December 9, 2016
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When one wakes up in the morning with extreme nausea and stomach cramps caused by ripping fake carts the day before.
Person 1: Dude, I’ve been dry heaving all morning and I have no Idea why.

Person 2: It’s probably Pesti Stomach from that fake ass cart you’ve been ripping.
by sr7777 June 19, 2019
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Similar to a sex pest, except a man of polish origin. This man will often run around wearing female undergarments for a cheap joke, sometimes splash himself with a dash of running water whilst fully clothed for a comical effect. His pestiness is not always of a sexual manner, however he is often just a dick for the sake of being a dick! His lack of respect for authority is often distressing to most, especially as he very well educated and cannot be caught out on intellect.
Top Lad 1: Oi you heard about that Dan kid? He is totally a Pesty Polski!
Top Lad 2: Heard about him? Why, his voice is everywhere i turn!

Top Lad 3: I'm going to drown him when he next showers in all his garments!
by TopLad69 September 23, 2015
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