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1.
when one person dreams, or daydreams, of being with another person, other than the person they are currently with.
SLOAN - Who is this?

BAS - The man of your dreams.

SLOAN - Oh my God! Johnny Depp?

BAS - Ugh, no. The other man of your dreams.

SLOAN - Julio Iglesias?

BAS - No, not Julio either. Guess again.

SLOAN - Brett Favre?

BAS - Damn Sloan! You’re such a dream cheat!
by john peterman November 13, 2007
 
2.
When you are currently in a relationship and in a dream you have sex with another woman
I feel so guilty that i dream cheated on my girlfriend last night
by TylerTheTigger April 07, 2011