[from the techspeak] (var.: hash
clash) When used of people, signifies a confusion in associative
memory or imagination, especially a persistent one (see
thinko). True story: One of us [ESR] was once on
the phone with a friend about to move out to Berkeley. When asked what he
expected Berkeley to be like, the friend replied: Well, I have this
mental picture of naked women throwing Molotov cocktails, but I think
that's just a collision in my hash tables.
Compare
hash bucket.