Tube Steak (Tubesteak)

A “tube steak” is another name for a “hot dog.” The origin of the name isn’t known, but “tube steak” appears in slang from at least the 1930s. “Tube steak” is somewhat dated today.
 
     
(Oxford English Dictionary)
tube steak slang, a hot dog, a frankfurter
1963 Amer. Speech XXXVIII. 272 Frankfurters are *tube steaks.
1978 Boston Globe 15 Aug. 1/1 The food isn’t bad which is mainly tube steaks (hot dogs).
   
22 April 1939, Charleston (WV) Daily Mail, pg. 3, col. 5:
He said it was called “tube steak” (simply “hot dogs” to the rest of America).