The word you say as a fall back in case of a teacher, parent, or superior overhearing you say the word 'shit'.
Also popularly followed by the word 'mushrooms' or 'shrooms' for a little laugh.
Person2 shows person1 a video of a huge explosion made from a TV.
*A superior walks by*
Person1: oh SHIT!
*Superior overhears the word 'shit' from person1.*
Persion1: -taki mushrooms are so good with rice.
*Superior walks away with a grin*
Person2: Dude, you almost got boned.