"I'm impressed!" (4)
(Other definitions for ooh that I've seen before include "Exclamation of surprise or pain" , "My goodness!" , "Exclamation of delight" , "sound excited" , "Expression of surprise" .)
(Other definitions for wow that I've seen before include "that's incredible!" , "boy" , "Amazing thing" , "Expression of great admiration" , "Palindrome exclamation of astonishment or admiration" .)
(Other definitions for damn that I've seen before include "Mild expletive" , "Condemn as worthless" , "hang" , "Censure" , "Blast!" .)