deadly

An adjective that means:

1. Can kill
2. Is able to kill
3. Yo' mamma

"This here snake is deadly, son. AHHH!!!"
"I fucked dealy last night."

by Kitty-Kat-Killer(KKK) September 29, 2003

deadly

Life threatening

Don't drink the poison, as it is deadly.

by Paul September 29, 2003

deadly

To "get deadly" means to take ecstasy.

Guy 1: hey Seánhead, are you gettin' deadly tonight?

Seánhead: I'm quite clearly off my face

by Samwab April 5, 2008

deadly

Describes something that has the power to make you dead.

It was a deadly mistake for Dan to go bowling that day. The mysterious guy who hates bowling killed him.

Sega made a deadly mistake with the Sega saturn. It died and was unpopular.

The venom of that snake is quite deadly.

by Sega Slayer February 10, 2007

Deadly

Something that is as cool as it is "dangerous". Like that one kid who walks to school wearing shades, a black vest, and is hiding the dope in his locker. This word is for those living on the edge!

Woah bro, that car lookin real deadly.
Bruh, that song is sounding deadly.

by King Parakeet November 21, 2018

Deadly

A word very commonly used by the irish to describe something beyond great.

Jamo's gaff is fuckin' deadly.

by Wezz November 17, 2004

Deadly

To mean awesome, great, excellent. (Aboriginal, Irish)

aboriginal: deadly, right?
racist australian: shut it abo

by theblueytimes September 22, 2023