a verb formed from the words grind and hustle meaning to put in work or constant effort against harsh opposition.

Also a noun as in "the grustle" -- i.e. the rat race, the daily grind.
How are things going?

"I'm on the grustle."

or

"grustling, son."
by diego del sol August 17, 2007
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The act of grinding and hustling at the same time.
Hey bro, you wanna go out for drinks tonight.

Sorry bro, tonight I'm grustling.
by From *memes August 30, 2021
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Adjective used to describe a manly-ass voice, a voice so manly you can actually visualize the vein-throbbing mass of muscle emitting from those precious precious vocal chords.
Yo dude, YaSushi’s voice is so grustled”
by The real nasa April 24, 2020
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