dumbbell 

having no knowledge or purpose, doesn't contribute much of work.

"You never seem to be useful, just a dumbbell in our thesis group!"
"You're a dumbbell!"

dumbbell by LinkedIdea February 29, 2020

Dumbbell 

Dumbbell is called when a person that you're partnered is dumb and possibly weighting down on your project

Normally used in Group School Projects and etc.

The person i'm partnered with doesn't even help me at the project and makes it harder for me, they're such a Dumbbell

Dumbbell by HotgiggityDog May 11, 2022

dumbbell 

The act of two males standing back to back with a dildo in eachothers assholes. Similar to scissoring but in a homosexual way. If u look closely it looks like a dumbbell ready to hold by the handle and lift up over ur head and rip those gays a new one.

Today I saw my daddy and my other daddy doing the dumbbell in my bedroom with my sissy dildo.

dumbbell by Dumbbell December 15, 2014

Dumbbell 

someone who denies they like pot and bums around all the time with nothing else better to do.

"I'm a dumbbell, I've watched anime all day."

Dumbbell by s**g February 27, 2009

Dumbbell 

It means your a dumb shit that wants to be carried by your teammates.(maybe in games or in group activity).
Watch "KPL Thesis Rant" for more information

Your a dumbbell

Dumbbell by StevenJacker February 27, 2020

dumbbell 

a bell with exceptionally low IQ

That is a dumbbell!

dumbbell by FieldMarshalFluffy April 16, 2023

Dumbbell Hogger 

The douchebags in the gym who hog multiple sets of dumbbells without racking them up for long periods of time.

Swole guy 1: "yo that douche has two 55's, two 60's, and two 65's. How am I gonna do my incline press"
Swole guy 2: "What a fucking dumbbell hogger"
Swole guy 3: "Fuck this, I'm doing crossfit."

Dumbbell Hogger by Football, money and ladies October 21, 2016