Similar to the phrase death on a stick, Satan on a bun refers to anything on a bun (sandwiches, burgers, ect) that looks incredibly menacing. It does not necessarily mean that the food can kill you. For example, a Big Mac, though extremely disgusting, could not be considered Satan on a bun because it is not a large, hard core, evil piece of food. The creation of the phrase can be credited to Sam Lindberg, who used it to describe a massive sloppy joe.
"Is that the sloppy joe I ordered? That thing's huge! It looks more like Satan on a bun!"
"I ordered a 24x24 at In and Out Burger... but what I got was Satan on a bun..."
"I ordered a 24x24 at In and Out Burger... but what I got was Satan on a bun..."
by Drüd October 18, 2008
Get the Satan on a bunmug. Mayo Buns is a stunt pulled by a dude in bed. It begins with a man and a woman having anal sex. When the man gets close to 'blowing his load' he pulls out and gets it all over her 'buns'. The buns may then be sticky and/or smelly.
by Jack Mehauph July 31, 2009
Get the Mayo Bunsmug. by 155004232 December 11, 2016
Get the bunny bunmug. by Nick_ger March 11, 2020
Get the Hunny Bunmug. 
by Danger Boy November 15, 2004
Get the bun upmug. by Bun Bao November 13, 2007
Get the Bun Baomug.