noun. Sweet mother Mary on a motorboat, it's that guy!
Real citation: "Valkyrie's That-Guy-Palooza
War movies are That-Guy magnets. (That Guys or Gals are those ubiquitous character actors whose faces you always recognize in bit parts--'oh, it's That Guy!'--but whose names you rarely remember.) It's not surprising--when you have large casts of folks in uniform with the same haircuts, it's important to cast faces with instant character."
(Jan. 8, 2009, Red Blog, http://blog.redbox.com/redblog/2009/01/valkyries-that.html)
Made-up citation: "Everyone is in this movie. I haven't seen such a that-guy-palooza since I left your mom's last night. Did I say that out loud?"