GrumpMaster 

Mackenzie is the master of all grumps. She tends to takes massive grumpies and has a weird fetish with them. She likes to take a picture and save every single one to her phone.

"Hey Lauren, Im the GrumpMaster check out this grumpy"

GrumpMaster by beezyweezybirdmanjunior May 20, 2017

grumpster 

n. similar to dumpster, but instead where happiness goes to die
n. a person that sucks the life out of the room no matter how hard you try to cheer them up
n. dark pit of despair, a black hole of unhappiness, a vacuum that sucks all hope and joy from the vicinity

MD is a grumpster because he will suck all your happiness away.

grumpster by JitteryJoe July 27, 2008

grumpster 

Grumpy hamster. A term of endearment for a moody person.

My boy is such a grumpster!

grumpster by shaeristina June 8, 2017

grumpmeister 

Very cranky toddler who will not be calmed down. Usually this behavior occurs when child is lacking in food, sleep or attention.

Why are you are being such a grumpmeister?

grumpmeister by Sonja Young January 5, 2009

FRUMPMASTER5000 

a nickname used for someone with great amounts of frump; awfully big in size, chunky, or fat.
a FRUMPMASTER5000 is the master of frump; frumpiest of them all.

Did you see Annabelle’s outfit, it’s seriously giving FRUMPMASTER5000!

FRUMPMASTER5000 by oafaloaf December 24, 2022

grumpster 

Another meaning for taking a dump.

Man I got to go take a grumpster.

grumpster by Clay Longfellow December 28, 2007

RumpMaster

A dude that talks women into anal sex

James: "Dude, look at Dean over there!!!, he just RumpMastered another bitch!!!" Marion: "Ya dawg, he must have stock in Johnson and Johnson with all the lube he buys!!!!!, Damn.

RumpMaster by CDAWG54321 May 1, 2022