Dennis 

One who engages in a sexual activity with any living organism.

Usually a female.

She's worked her way through the whole football team.

What an absolute DENNIS.

Dennis by WezzED December 7, 2010

Dennis 

An umpalumpa Usually called by the sexy chelseas. Is very nice and lucky to have in your life. A dennis is usually sporty. Also is a wild, crazy, fun, weird, handsome person. Can also be the sweetest guy when he really likes someone. The best Dennis's are Assyrian.

I dated a Dennis once and he was AMAZING! To bad it ended...

Dennis by dysfunctionalfam December 1, 2010

Dennis 

A breed of person closely related to a rabbit capable of destroying cities with his whiskers and breaking chairs.
Although formerly asian, this dude looks completely american.

Relentless of everything else, he's and amazingly hardcore person and is commenly known as "Ploka-Dot"

"That guy is breaking chairs!? It must be dennis."

Dennis by potazzium October 14, 2008

dennis 

Another word for penis

Suck my fat dennis

dennis by hadot September 18, 2016

Dennis 

Your pervert teacher who always touches you!

Yeah...he's a Dennis

Dennis by H_{} September 17, 2016

Dennis 

Dennis is not very smart . Kinda looks like Justin Bieber. You know when he walks in the room even when your not looking. You get along with him the first time you see him. He is also the most model looking guy you see he loves soccer and he loves to eat. He might hang around dumb ass people but he’s the best person to be around . He might get jelous at times but he means well. That’s Dennis for ya .

Hey Dennis came in the room

Dennis by Mexican.princessa February 9, 2019

Dennis 

Dennis is a guy that is bad at fortnite he always gangs up on autistic kids

Yo, stop Akin like a Dennis

Dennis by Rob Next2You September 23, 2019