2 definitions by colinisadumbass1234
National Slap Your Older Twin Day, occuring annually on April 17, gives the younger twin a free pass to slap their older twin. Maybe it's pent up resentment for being beat out of the womb, maybe it's just for fun, either way: they're free to slap.
"My twin slapped my today, but it's okay because it's April 17, so it's national Slap Your Older Twin Day, and she's the younger twin"
by colinisadumbass1234 April 17, 2020
Older twin: *gets slapped by younger twin*
Older twin: "What was that for?"
Younger twin: "It's April 17"
Older twin: "Oh, I should have known... National Slap Your Older Twin Day"
Older twin: "What was that for?"
Younger twin: "It's April 17"
Older twin: "Oh, I should have known... National Slap Your Older Twin Day"
by colinisadumbass1234 April 17, 2020