One day, this girl kept misspelling Fuckin to fuckom. The dictionary in her phone finally changed Fuckin to Fuckom, so it caught on, and now we all say "Fuckom" instead of "Fuckin".
A bro that helps out another bro by driving him to buy condoms or to his girlfriend because he can't drive. (For any kind of reason)
bro1: Dude, thank you so much for driving me. She finally wants to have sex!
bro2: Whatever man. Just forget about it. But this is the LAST time I will be your fuckomplis alright?