A term referring to prepubescent kids, most especially those playing online games. These types of kids generally talk or complain constantly with their prepubescent high pitched voices causing annoyance to the mature players. Be warned, as calling these kids a squeaker will generally cause them to literally start squeaking.
(High Pitched Squeaker Voice): STOP KILLING ME. YOU'RE NOT BEING FAIR. STOP KILLING ME BEFORE I GET A CHANCE TO KILL YOU. STOP. STOP. STOP. STOP. STOP...
(Mature Voice): Damn kid. Shut up and stop squeaking.
(High Pitched Squeaker Voice): SQUEAK SQUEAK SQUEAK