When a person take their entire academic or work day to jack-off.
When one takes the entire day off of their job or regular school day, to devote the time to constant jacking-off (masturbation).
Eric took the day off to j off because the night before, he saw some hot rule 34 of mudkip and swim meet on Anon.
by Eric Bloom October 10, 2007
When a person take their entire academic or work day to "jack-off".
I took the day off to J off cause he saw some hot Mudkip "rule 34" on "4chan".