To drive(by yourself) 6-999,999,999,999,999,999,999 both legal and new Bentley motor vehicles at a time without any help WHATSOEVER.
Wow, that kid really is, deadly.
by not legally GTA_DEADLY August 27, 2023
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incredibly ill performance of a smoking tool(referring to bud)
"Yo, that bong is deadly!"
by ILL SILVS March 12, 2010
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Something that can kill you. Fast. Like me.
SHIT MAN! That axe is deadly!
by Your Ass September 29, 2003
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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
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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
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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 September 28, 2003
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