That smelly kid whoes always around.
Any loser, geek, nerd or socially retarded person. usually has crooked glasses, and/or greasy hair.
Calling someone named Barry 'a barry' will lead to confusion from them and laughs are had by all
1 - 'come on mate, it'll be funny'
'no way, we'll get into trouble'
'god ur such a barry'
2 - 'haha did u see what barry was doing in the toilets? what a barry'