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
grind + hustle = grustle
"I'm on my grustle."
by mikey star March 24, 2007
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 31, 2021
Hey homie, did you see those two guys grustling?!?

I sure did!!
by B33rbelly February 25, 2022
Sigma grind-hustle
Tom: Yo, have you seen? Lewis has really been on a sigma grustle to get his GCSEs.
by Yung Marmite January 18, 2022
Grind + Hustle = Grustle
Romello is always on the grustle
Romello is grustling in new world.
by BALMY December 29, 2022
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