“I used to be a shoe salesman, but they gave me the boot”

A pun about working as a shoe salesman is:
 
“I used to be a shoe salesman, but they gave me the boot.”
 
“I worked in a shoe store, but they gave me the boot” was posted to the newsgroup alt.humor.puns on June 28, 1997.
 
   
Google Groups: alt.humor.puns
The silly jobs thread
Shelley Levine
6/28/97
(...)
I worked in a shoe store, but they gave me the boot.
 
Google Groups: alt.radio.talk.dr-laura
Ode For Oooooooooze
Oz
9/23/10
(...)-
“I need a job.  I used to sell shoes, but they gave me the boot.”~~~Nemo
 
Twitter
Chris Ward #72‏
@CRWard77
Loved working in the shoe shop, but they gave me the boot :(
8:57 AM - 19 Jan 2011
 
Twitter
Ricky Clarke‏
@YA_RickyClarke
I used to work in a shoe shop. But they gave me the boot.
1:04 PM - 2 Mar 2011
 
Twitter
PUNS‏
@omgthatspunny
I used to be a shoe salesman, but they gave me the boot.
6:15 PM - 23 Oct 2012
 
Twitter
Puns of Jokes‏
@punsofjokes
I used to be a shoe salesman, till they gave me the boot.      #jokes #makemelaugh
11:16 PM - 31 Mar 2017