A "fuck boi" is a douch bag usually anywhere from 12 to 22
12 to 15 year old fuck bois- They wear sports attire and talking about having sex with girls even thought they haven't. And they've had multiple 'girlfriends'
If you ever date one throw his ass in the garbage like the condom your hiding from your mother.
A faggot who denies it and is not only obsessed with with having rough sex with computers and often inserts his own floppy disk. Won a karate tournament against a small child once. Loves them soccer balls in his mouth.
Dat Boi, a colloquial pronunciation of “that boy,” is a nickname given to a 3D character model of a green frog riding a unicycle, typically accompanied by catchphrases like "here comes dat boi!" and "o shit waddup," that went viral on social media in early 2016.
source- knowyourmeme.com