The adrenaline rush of an overwhelming orgasm after not climaxing for a very long time. Often resulting with the end user to make noises or faces resembling a retarded person.
"Bro, I finally got some actionlast night. That girl totally gave me that Tardgasm"
The euphoria one experiences when shopping in Target after being deprived of this experience-- for instance, by living in a rural area or moving to a backward, undeveloped nation.
"After 6 months with the Peace Corps, I returned to San Diego and had to restock all my cheap plastic apartment crap. I went to Target and got all flushed and giddy and just felt this rush of ecstasy pushing my massive cart through the glossy, brilliantly lit aisles. Then I went to a second Target, making this a multiple Targasm -- The Big T! When it was all over, i wanted a cigarette-- and i don't even smoke."
Generally after constipation, when one shits so hard that the feeling of relief and the stimulating of the sensory neurons in the anus, generate an orgasm so intense that many have been know to become enraged and rip the fucking toilet seat off of its hinges.