Flump 

To fall without grace into a seated or laying position.

Don't flump down on the bed!
Or

That kid just flumped down on the couch and almost broke it.

Flump by Kcraig115 December 18, 2016

Flump 

A hair bump that appears on your head after you wake up in the morning. Any bump on you to appear randomly.

jasmyn "good morning jordan."
Jordan "omg look in the mirror you have a flump!"
Jasmyn "oh no now i cant straighten my hair!"

Flump by Talhotblonde March 26, 2017

Flump 

When you feel like the sound poop makes when it falls in a toilet (pronounced floomp)

I feel like such a flump

Flump by Liv Life May 6, 2017

Flump 

A fat lazy lump of fur. Typically a larger fat long hair cat.

The flump slept peacefully on the warm sunlit pillow.

Flump by Flumpadumpadoor May 22, 2018

Flump 

When you're not exactly Fat, and you're not exactly Plump, you're Flump!

I need to lose some flump at the Gym.

Flump by Cyclops Man June 3, 2018

Flump 

The act of

Fucking
Licking
Umbilicus
Masturbation
Pelting

Dude last night I gave my GF some Flump.

Flump by Rick Suncurve June 6, 2018

Flump 

In Rainbow Six Seige when everyone on your team uses their ability all at once.

Boys I’m pushing Operation Flump is a go!

Flump by FlintySpark026 June 6, 2018