Noun - Someone who recoils off the bed (and up the wall in some cases) as a result of mind blowing sex, whether it be actual intercourse or oral.
Adjective - phenomenal sex, leading to the girl recoiling off the bed and "crawling" up the wall.
n. Dude, last night I was giving it to Jane real rough and she became a wall crawler.
adj. Last night me and Jane had a real wall crawler.