a variation of yes or yep used in almost ever sentence by students in arlington virginia high schools.
guy one: yo brehhh, waz gud? u tapped that shit yet?
guy two: YURP!!!
to kill someones excitement, killjoy, buzzkill, to inform someone of bad news
guy one: daawg im soooo syced for kevins party this weekend!
guy two: breh, no one told you? Kevin got the flu.
guy one: blowwwn! You always Slice my syce brehhh!!!!