Daniel Stendel was hailed as 'a legend' after he was filmed downing a shot with Barnsley fans the day after being sacked by the club.
Barnsley after their tough start to the Championship season.
The Yorkshire club were thrashed 5-1 by Preston on Saturday, dropping to 23rd in the table after an 11-game winless run in all competitions.
But the fans have not forgotten that the German led them to automatic promotion from League One last season, and footage has emerged of him downing what looks like a tequila shot before sucking on a slice of lemon as fans shake his hand and commiserate with him.
The video was posted on Twitter , and drew praise from fans who were "mortified" and "devastated" to see him sacked.
Club bosses opted for a change with the club two points adrift of safety, with Adam Murray taking caretaker charge ahead of Saturday's home game with Swansea City at Oakwell.
A club statement read: "Barnsley Football Club confirms that it has separated from Daniel Stendel with immediate effect. Adam Murray has been appointed caretaker manager."
Barnsley got their return to the second tier off to a perfect start with a 1-0 win over relegated Fulham .
But they have not won a game since, with their drubbing at the hands of Preston proving the final straw.
Stendel, 45, impressed in his first season in English football.
He was handed the job having previously managed Hannover 96, where he worked his way up after coaching their Under 19s.
Stendel hit the headlines last season after a clash with Fleetwood Town manager Joey Barton.
South Yorkshire Police launched an investigation into allegations Barton assaulted Stendel in the tunnel after Barnsley claimed a 4-2 win at Oakwell.
Barton to a charge of causing actual bodily harm when he appeared at Barnsley Magistrates' Court on Wednesday.
Barton, who denies any involvement, will appear at Sheffield Crown Court on November 6.
