Keep fighting with them until they're begging for forgiveness.
Cheat on them.
Hack their social media accounts.
Give them the silent treatment for a full two weeks.
Secretly call the friend you're gossiping about and put them on speaker.
Gossip right back with a fake rumor.
Secretly record the gossip to use as blackmail later.
Throw your drink on them and leave the lunch.
Buy it anyway and max out your card.
Buy it, max out your card, and then buy 10 more things.
Damage it in some way to try and get a discount.
Texting your ex.
Asleep in the bushes.
Ordering food from a sketchy restaurant.
Going home with a random stranger.
Hit that snooze button a few more times and roll in about four hours late.
Call in sick even though you're out of sick time.
Don't go in and don't call.
Literally call and quit–you hated that job anyway.
Cheat on them right back.
Go through their phone to try and confirm.
Secretly follow them to try and catch them in the act.
Start unplugging their phone every night so it's never charged when they wake up.
Storm into their room and scream at them until they order you more food.
Leave food scraps from the trash in their bed.
Eat their food to even it out.
Secretly replace their almond milk with dairy milk (they're vegan).