Sid Farkus is friend of Frank Costanza, although it is not very clear if the bra seller is named Phil Kassikof.
Farkus is George's boss at the bra company until his boss Ellen made him fire George.
Sid appeared again in The Doorman, helping Kramer and Frank Costanza create the Bro, a bra for men.
The relationship between Frank Costanza and Farkus deteriorates when the bra salesman hints that he wants to date recently divorced Estelle.
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* Just Shoot Me!