Its the same as damn, but you pronounce the sound of the "Y". You usually say it after something
dramatic happens or when some
gnarly stuff goes down. The word "son" is put after it lots of times so it makes it sound more
buttery.
*some dude
dumps his girlfriend*
random on-looker"
DAYUMN SON!
*a rapper throws down a sick rhyme"
everyone: DAYUMN
NIGGAZ!