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"Hey sis, that band last night was deadly"
Deadly by Attika November 6, 2018
Meaning your deadly
(Me) “ hey cousin i think your deadly”

(Cousin) “ naaaaaa Holayyy Assssifffff”
Deadly by Half native boy December 8, 2019
incredibly ill performance of a smoking tool(referring to bud)
"Yo, that bong is deadly!"
deadly by ILL SILVS March 12, 2010
1. An Irish term for cool or awesome!

2. When something could kill you or is risky.
1. Irish Guy- Last night I went to a party! It was deadly man!

2. Guy-I saw a show on TV and some guy was gonna try bungie jumping with dental floss! It was sooo cool! I want to try!

Guy 2- Are you crazy! That's deadly!
Deadly by mooshi800 April 20, 2009
Something that can kill you. Fast. Like me.
SHIT MAN! That axe is deadly!
deadly by Your Ass September 28, 2003
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."
deadly by Kitty-Kat-Killer(KKK) September 29, 2003