To go out looking, hunting for extremely obese women(like the mother in, What's Eating Gilbert Grape), to have sexual relations with.

Way past hogging, plus no alcohol, or drugs is involved, just the pure enjoyment, and bragging rights of beaching a real heavey, or worthy trophy.
My cousin said upon seeing a two extremley large girls, one with a 4 prong cane, the other on a jazzy scooter, "it looks like a great night to be Commercial Whaleing".

A coworker of mine, said after a night of commercial whaleing, he was afraid they were going to have to cut the wall out of his house to remove his prize.
by JJBIII October 16, 2009
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