15
It basically means the word 'Damn' but it's spelt how you would pronounce it.
*Hot girl walks past*

Guy: Dayum!

-----------------------

*Chatting on social networking site*

Guy1: Did you see 'So+so's' profile picture?

Guy2: Yeah!

Guy1: Dayum, she's hot!
by urbandictionaryisdon August 26, 2011
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16
used as a substitution for damn, by choice, or by accent
"did you see how fat she is now? Day-um!"
"daaaaay-um son!"
by thatdangwhitekid November 05, 2009
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17
Somthing you put on your sandwage for some extra DAYUM!
Take: "Can you pass the Dayum please."

Hiro: "Sorry i used it all for my damn sandwage."

Take: "Darn"
by Take151 August 11, 2006
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18
A combination of the words Damn and Yum; A word usually used in a situation when a gurl walks by with a nice round ass.Or is very attractive.
Gurl walks by-

Boy:-leans- Dayum!! That gurl has one niiice ass. I'd love to eat her up =P.
by .:º:.charlie.:º:. July 18, 2006
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19
The word -damn- as it sounds when said by blacks.
dayum, dem white bitches is smoking!
by sezwaq November 01, 2009
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20
A saying used when you see a female with a nice backside; the same as "DAAAAAYYYUMM!!!" but to a smaller extent.
When he saw sexually harassing females, a woman walked by with an ass that made him say "DAYUM!"
by xlae-x March 24, 2003
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21
the term justin and akiva use to sound black and piss the heebie jeebies out of young and unsuspecting extra-virgins.
dayum that ocp girl is hot.
by dworkinator March 23, 2009
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