A person who continually leaves unwanted posts on your Facebook wall.
"Hey Stacy, I saw that Jim left another post on your wall this morning."

"Yeah, I know. That's his third this week. He's such a wall gremlin."

"Go Bengals!"
by CarthOnasi April 7, 2007
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An amazing bitch who practically lives on a wall.
Almost always found in a country.

Rarely in space
My friend is in fact a wall Gremlin
by WhereIsWillToLive March 7, 2022
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