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1.
Plan Q

The French version of a friends with benefits arrangement.
Can also be referred to as:
Plan Baise
Plan Cul
A: I heard you and Sara were a couple?
B: Nah she's just my Plan Q
A: Oh... My Plan Q is your ma
B: ....
by rzhhhh April 18, 2011
 
2.
To be a planq:

a retard, weirdo
Damn, Manuel is a planq.
by m0ns00n April 14, 2007