The AFL did it first so that would be 1960, but your question asks when the NFL started it which would have to be after 1970 sometime....hmmmmm
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EM-F-er [ěm -f-er] – noun-abr-slang: Electric Miniature Footballer
1. a person/hobbyist/gamer who creates a representation of American Football in a small or reduced scale for competition or show.
2. the majority of forum users on the website, www.miniaturefootball.org
—Idiom
3. One Bad Em-F-er, negative shout out; pertaining to weirdwolf: There goes one bad EM-F-er. I mean he can’t play and ain’t never win nothin’!
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