When someone studies peoples posts on Facebook (Comments, pictures, status updates) to the point to where they know everything about a persons life, without ever talking to that person. A classic Face-creeper is known to know way more about a victim than the victims best friends know about him.
Phil: "Who knows where Kelsey is?"
Sid: "Oh. Kelsey is soo totally bored while grounded for getting a D+ on her math final."
Doug: "What?!... When did you talk to her? I didnt even know you guys talk that much.."
Sid: "Kelsey added me last week on facebook. Did you not see her latest 8 updates?
Doug and Phil: "FACE-CREEPER"
Sid: "Oh. Kelsey is soo totally bored while grounded for getting a D+ on her math final."
Doug: "What?!... When did you talk to her? I didnt even know you guys talk that much.."
Sid: "Kelsey added me last week on facebook. Did you not see her latest 8 updates?
Doug and Phil: "FACE-CREEPER"
by RiotROy! April 8, 2010
Get the Face-Creepmug. Man at the bar last night every girl I took a picture with did the Howard face. What the hell. They ruin everything!
by clubdining November 13, 2009
Get the Howard facemug. 
Get the trailer-facemug. by jimb0ne January 18, 2012
Get the face spacklemug. A library face is defined as someone who appears to be an avid library visitor. This phrase is intentionally vague for people to interpret it how they want. A person with a library face is often annoying and lacks women.
by RobloxEggHatcherSimulator December 21, 2021
Get the Library Facemug. 1. A straight face, usually scary. Implies a negative thought toward whoever is being looked at. Sometimes used humorously amongst a group or groups of people.
by raptroes February 12, 2010
Get the menu facemug. by Charlie Snidge May 14, 2019
Get the Weasel-facemug.