A name for a person you talk to without having a clue about who they are. This can be someone you use frequently in conversations without their knowledge, and/or stalk.
Hey, random guy, how's it going?
I just told a random guy that I love him.
term used to describe someone meaningless to you, as if he is "no big deal"
BF: why did you make out with him? i thought we were an item
GF: i know i'm sorry but i was drunk; besides it was just some random guy
male friend: i was going to give you shit last week but i didn't want to embarrass you
female friend: why? what do you mean?
male friend: for the hickey you had on your neck
female friend: oh yeah that lol it was just some random guy