pro-boy 

Pro-boys short for proletariat boys.
An anti school subculture which will have formed naturally. This mainly occurs in boys because they produce ‘laddish’ behaviour. In the anti school subculture, the pro boys usually believe they are more superior than those around them and may also achieve status among their peers by displaying their academic abilities.

Alfie Russo : *acts like the main character*
Person : “omg Alfie Russo is such a pro-boy”

or

Alfie Russo : * walks past*
Person : “here comes Alfie the pro-boy”

pro-boy by Assy K March 11, 2021

pro-boy 

to be a gay or homosexual, in the male sense.

tom gordon is pro-boy with ACB

pro-boy by jimmy91 January 1, 2007

proboy 

A person think who is pro but not infact he might have chance to be the stupdiest person. If he still call his self proboy he is 101 gay.but now he stops call his self proboy he got matured and got very smart then his limit

Omg im proboy
(The guy is gay) or amateure

proboy by BERLIN JAMES CHARLES August 6, 2019

ProboyYT 

ProBoyYT is a fake god one any game using hacks and great unbanned for bad admins. Mainly found in Hyperlands
A bedrock Minecraft server.

Person one- Wow look at this god ProBoyYT player
Person two- Oh wow look at that cheater

ProboyYT by NYUKgamer February 19, 2021