Fuckboyishly 

When somebody exudes fuckboy energy- the act of doing something like a fuckboy

Geoff bit his lip fuckboyishly

Fuckboyishly by Maxx Bastard June 21, 2021

fuckboyishh

Having the tendencies to be a borderline fuckboy

Johnny: “I can’t think of one person who wouldn’t want to have sex with me, I’m a catch.”

Julia: That's so fuckboyishh for you to say

fuckboyishh by SmallAl March 25, 2016

Fuckboyish 

Acting like a fuckboy without being a fuckboy

That picture Eddie posted is so fuckboyish

Fuckboyish by ShabbaHD October 22, 2016