What is That's What Your Mom Said?
1.
A clever combination of "that's what she said" and "your mom!". It was created to avoid the argument that "that's what she said" creates confusion because "she" is nobody while adding the punch of "your mom" jokes to it.
The phrase "last night" may be added to the end if extra pwnage is needed.
Person 1: "Whoa, that's a big hot dog"
Person 2: "That's what your mom said!"
Person 1: "Whoa, that's a big hot dog"
Person 2: "That's what your mom said last night!"
See
2.
A mix of
Basically means the same thing as
Bob: Damn, that was hard!
Joe: That's what your mom said!
Steve: I need a hard surface...
Jill: That's what your mom said!
See