The kind of amnesia experienced when one takes the sleep-aid Ambien.
Guy: Dude why did you text me in a foreign language last night?

Girl: I have no idea...I must have Ambnesia. I have candy wrappers in my bed, also.
by GinaMarie November 2, 2008
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Memory loss associated with intake of ambien or other sleep aids.
Jeez, there is a quart of Ben & Jerry's missing from my freezer! Did I eat this? I live alone... I must have ambesia/ambnesia!

My idiot husband is away on business and he says he called last night. It's actually there on the caller ID...could I have ambesia/ambnesia?

What the..., St. Louis? Did I drive here last night? I must have ambesia/ambnesia.
by AKolb March 28, 2009
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