A term made up by the 'Diary of a Wimpy Kid' used asa 'Your Mom' joke.
Substitute teacher: Greg, can you answer this problem?
Greg: Your Mama!
Subsitute tecaher: Excuse Me?
Greg: Your Big Fanny Granny!
Subsititute Teacher: Well I hardly think that's -
Greg: Your Slaphappy Grandpappy!
Not to be used unless in great danger as it will destroy the entirety of all space and time being.
The only time it should be used if someone harms you to a point of no return only this can cancel the harm done.
Dave - ur sister a mister
Carl - ur grandpappy a trappy
*Dave’s body is consumed and eradicated by space it’s self to the point where there is a infinite hole of agony and suffer corroding the expanding universe*
The worst roast you could ever give. It's even worse than Ur Mom Gay and Ur Dad lesbian and even worse than Ur granny tranny. It will end everyone you say it too.
Person 1: Ur Mom Gay
Person 2: Ur Dad Lesbian Person 1: Ur Granny Tranny
Person 2: Oh Yeah! Well Ur grandpappy do meat slappy