1. What seems to be a great guy, but is actually the complete opposite.

2. A poor imitation of a soulmate/awesome guy.

Derived from the phrase:

"My knight in shining armour turned out to be a loser in aluminium foil"
Marquesa: I don't know why she's still dating him.

Calpurnia: I know, he's just a loser in aluminium foil.
by TeapotOfKarma April 14, 2009
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