n. 1. a fast food item ordered in addition to a preconfigured value-type meal for purposes of advanced hunger satiation. 2. any item serving as a supplement or bringing added value to a primary or original. 3. a secondary entrance. The front door was locked, but I had no problem rolling in through the sidehatch. 4. a girlfriend. Will the sidehatch be joining us?

adj. Auxiliary; supplementary. At Burger King I usually get a Kids' Meal with a sidehatch burg.