“Four get” (like the word “forget”) is a Texas A&M Aggie term that was used at the “chicken ranch” (“best little whorehouse in Texas”) at La Grange that was closed in 1973.
 
“Four get” =
“get up”
“get on”
“get off”
“get out.”
   
     
October 1973, Texas Monthly, Closing Down La Grange”:
It had been what’s known in the trade as a “Four-get”: get up, get on, get off, and get out.
     
This Dog’ll Really Hunt:
An Informative and Entertaining Texas Dictionary
by Wallace O. Chariton
Plano, TX: Republic of Texas Press
1999
Pg. 118:
Four get: When the famous Chicken Ranch was open near La Grange, Texas, they had an $8 Aggie special. Aggies called it four get: get it up, get on, get off, and get out.