Deelishus Weenie is one of the many restaurants from the Zim universe. Although we get several short cameo shots of DW, (including having a policeman crash into a giant weenie in Attack of the Saucer Morons) the organization takes an active role in Tak: the Hideous New Girl when Tak manages to supplant the president and founder of the company and uses it's resources for her own nefarious plots.
DW is also another of the businesses whose name varies a bit throughout the series - at least as far as me typing goes. It seems that every time I write about it I spell Deelishus a different way. Oh, well...