An individual that is obessessed with homework yet still finds time to party it up and party they do.
It's a Friday night and Jaymie is drunk, but the party is dying down so they pull out their homework. Therefore Jaymie is a keener.
"I was studying for fun earlier let's get plastered now!" < that would be a keener talking or Jaymie
"You're a keener" or "What a keener" (refering to jaymie or taylor)
"WTH Taylor is on the principals list but got so drunk that her hangover resulted in taking half an hour to walk a block and sitting in 5 different puddles along the way" TAYLOR WOULD BE A KEENER.
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