Fust is a general expletive used in New Zealand to express frustration or disapproval. Fust is often used as an inoffensive substitute for the word 'Fuck'.

Fust can be also used to describe a person or situation that is pointless, useless or generally cringeworthy.
'Oh my god this party is fust'
'Fust off'
'Jade and Dion are so fust'
by fustguy June 14, 2014
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(1) To mould/become mouldy or to waste away

(2) Just a generally awesome word, to use in generally awesome sentence or just as an outburst because of it's awesomeness.
(1) "Go and fust in the corner"

(2) "Fust. How awesome"
by I Sit Next To You In English December 28, 2011
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~Fucking stupid.
~When you want to say someone or something is fucking stupid without saying, "fucking stupid".
"That's fust!"
"I'm not doing that because it's fust!"
by Cosado11 January 28, 2019
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When you fuck a girl and fist her at the same time, stretching her cunt to be 20 times the size.
Jose: Maria, what's your opinion on fusting?

Maria: Oh, its quite enjoyable.
by GerryThornberg January 10, 2009
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Fisting is the act of inserting ones fist into another persons asshole for sexual pleasure. Fusting is quite similar, however there are a few extra steps. First, one must use two-three fingers when making initial contact with the anal cavity, next comes the "toy" (dildo) and yep you guessed it, it is inserted into the anal cavity. These first two steps are done prior to the insertion of the fist. The idea is, the first two steps will open the cavity widely enough to shove a fist up ones asshole.
Him: How many fingers will you use? Her: Hmm, your asshole is already pretty loose from last night, I'll just use two. Him: Oh ya don't forget to bring the pink toy so we can spread it even more and hopefully you can start Fusting me. Her: Of course, you know it! ;) Him: HeHe bet
by Br0ken Wiind0wz November 10, 2020
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short for "fucking busted", similar to fugly.
Damn that bitch is fusted.
by F. Usted March 9, 2006
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To fist fuck. Penetration of a vagina or anus with a fist.
I'm gonna fust the shit outta that skank tonight, her pussy is so loose its like fucking soup.
by BiG nELLs. January 25, 2005
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