verb: to be overly excited by the new FOX television show 'Glee'. Possibly described as fangirling about the show or its characters. Best when done in groups.
Person 1: Oh my gosh, I was totally Gleeking about the new episode of 'Glee' last night!
Person 2: Yeah! Me too! I loooved the musical number!
Person 1: I know, it was so awesome. And did you notice... (etc)
Originated from the 70's superhero cartoon Spaceghost where a space monkey character named Gleek from the planet Exxor would often spit from under his tongue. The word 'gleeking' was derived from this action.
"Nice going, Gleek. I didn't think anything could stop Super-mouth! Your gleeking has once again saved the universe!"