What does "wall" mean in slang?

In slang, wall has several meanings depending on context and community, including barrier, being stuck, hitting limit, or attractive person in some regions. Common slang meanings include hitting the wall meaning reaching limit of endurance, like runner hitting wall when exhausted, similar to organizational system overload. In some slang, wall means to be ignored, like talking to a wall meaning speaking without response. In prison slang, wall can mean to hide contraband. In sports slang, wall means unbeatable defender. In internet slang, wall can mean Facebook wall or social media profile where posts appear, as in post on my wall. In some British slang, up the wall means crazy or angry, like driving me up the wall meaning irritating. In climbing slang, wall means climbing wall. In some youth slang, wall means to be very drunk or to be blocked, as in walled meaning intoxicated. In gaming slang, wall can mean to use wallhack cheat. In construction slang, wall can mean to fail or to be stuck. So wall in slang most commonly means barrier or obstacle, hitting limit, or social media wall, with phrase like off the wall meaning crazy or unconventional, and talking to a wall meaning being ignored, indicating obstruction or limit in communication or progress.