Taco Bell is an American restaurant chain based in Irvine, California. A subsidiary of Yum! Brands, Inc., it specializes in Mexican-style food and quick service.
Roger and Klaus are seen walking into a Taco Bell while visiting Rome, in which they say they will make up for it by eating a "nice Italian meal" in "Red October Sky".
When Roger's Buck Wetnap persona tells of surviving four days in a Del Taco parking lot on puddles and bird shit in "Daesong Heavy Industries II: Return to Innocence", Steve questions why he simply didn't go into the restaurant. Buck explains that it was because he is a Taco Bell man.
Francine discovers Taco Bell and other fast food wrappers while searching Stan's desk in "Z.O.I.N.C.S.".
Steve notes that Vince Chung actually likes Barry because they witnessed a murder at Taco Bell together in "Steve, Snot, and the Quest for the Og 4Loko".