Similar to the popularly used term Netflix and chill, it is when two people have intercourse after playing the Nintendo Switch®.
Bennis: Hey down to play some Splatoon 2®
Joy: Switch and smash?
Bennis: oh yes I can't wait to ink all over you like an inkling ;)
Joy: count on it
When you and your homie are dating sisters and without telling them you switch places and have sex with the other sibling.
-Hey maxime, you down for a switch ‘n smash this weekend?
-Sure! :)