A low quality cartoon idolized by 16 year old boys that wear 'My Little Pony' t-shirts.
It is hypothesized by many critics that SpongeBob Squarepants is the modern day equivalent of bloody fecal matter, yet a majority of people argue that bloody fecal matter is far more humorous.
I would rather shove a handfull of razors in my asshole and listen to Celine Dions entire compilation of music than to watch a single episode of SpongeBob Squarepants.
Using Foursquare to see who has checked into the venue you are at, and then looking around to try and find them.
Square Stalker: *shows friend picture from Foursquare profile on phone*
Normal Friend: What?
Square Stalker: This person is here. Do you see them anywhere?
Normal Friend: Dude stop square stalking, weirdo.
Someone who is unaware of or oblivious to a specific subculture; one who "doesn't get it." A person afraid to go out of their comfort zone.
On the search for marijuana, Tim asked Fernanda if she knew where he could find some "Mary Jane" but she was such a square she thought Tim was looking for white girl named Mary that worked at Starbucks.