In gaming, the explosively great feeling that one feels when hitting a new level. Often accompanied in many level based games by some type of visual reinforcement and/or audio fanfare. A combination of level and orgasm. (Levelgasm™ - VuDu DawL, used by permission)
My character has a bind so she can say "Levelgasm, baby! Was it good for you too?" after she or someone else hits a new level.
"Levelgasm - like an orgasm but lots less messy, unless you get so excited you spill your beer!"