when a prostitute costs more than you can afford.
"no thanks your too sexpensive"
by NinjaCheese123 June 1, 2009
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Takes money or materialistic things to engage in sexual activities.
I better get a job if I expect any love from her, she's sexpensive.
by metric_system July 29, 2006
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Something you buy a woman in the hopes of getting laid.
"Drinks, dinner, shoes... and for what? Just another sexpense, I guess."
by thescoshow December 17, 2013
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Money saved up for services provided by an escort/prostitute.
Bill: How was your weekend with Candi?
Ted: Oh man, she totally wiped out my sexpense account.
Bill: Yea but, was it worth it?
Ted: Do I only have one testicle? HECK YES IT WAS!
Bill: ...you-...huh?
by Timbo_Slice June 19, 2008
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An IMPLICIT call on long-past sexual-favours for current or future moral-support which may run counter to the inclinations of all but a minority in the group.
-- Okay, so, like you know how, formerly, people might have many kids to insure for some old-age security?

-- Yeah.

-- Whereas now we have pensions...

-- Okay....

-- So it isn't procreation anymore which provides benefits, but sex itself.

-- Ah-ha, so a broad network of past lovers with hope translates into a large network of friends.

-- Exactly. Benefits lead to friends, and friends can be called-on for help and moral-support even when it's challenging for them at-times.

-- Ah-ha, a sexpension of disbelief!!
by sukadog March 29, 2011
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