To be Speechless/flabbergasted/confused/tense.
Guy 1: .....And finally after you put the hole in the center of the apple pie, microwave it for 45 seconds....
Guy 2: (shook)
Guy 1: you look shook
Guy 2: I am shook. (I'm shook)
Guy 2: I just wanted to know the best way to make apple pie. My god man....
To look at people of your same age more favorably than others in most cases
Beth gave Susie the job of librarian administrator instead of Grenada who was buxomous and half her age. It truly was a case of agekin.