noun, The term used to represent the event any man, including myself, despises: Getting an erection in public, usually when in an open area and/or near many other people. The victim generally walks like an old guy, seems to be weilding a very large gerbil in their pants, or simply tries to think of gory, morbid, discusting, non-arousing things to get rid of The Surpriser Riser. Usually, when the man may be ok with having an erection later, as he is alone, he will not get one. Until he goes out in public again.
"Oh, fuck! Not The Surpriser Riser again!"