Burger/Hot dog joint. Basically hamburgers slopped into a sandwich bun.  It is a cultural icon in Westwood among undergraduate college students and is among the latest eateries to close in Westwood Village.
Actor Jerry Ferrara aka "Turtle" from "Entourage" cofounded this place with Sal himself, who is a hefty man.
Fat Sal's was founded in 2009, to cater to the UCLA college student party lifestyle appetite. There are now locations all over Los Angeles.