What is "don't get me started"

phr. (context idiomatic English) (non-gloss definition: Used to attempt to avoid or abbreviate a discussion that speaker or hearer may wish to avoid).

"Don't Get Me Started" is a song co-written and recorded by American country music artist Rhett Akins. It was released in March 1996 as the lead single from Akins' Somebody New album, it is also Akins' only number one hit on the Billboard Hot Country Songs. The song also peaked at number 3 on the RPM Country Tracks in Canada. It was written by Akins, Sam Hogin, and Mark D. Sanders.

Don't Get Me Started is a 1994 movie directed and written by Arthur Ellis. The movie was released in 1994 in both United Kingdom and Italy, but in the United States it was released in June 2, 1995. The movie starred Trevor Eve as Jack Lane, Ralph Brown as Larry Swift, and Steven Waddington as Jerry Hoff.