Originating in the construction and remodeling trades. The Fuck-on-ability Rating is a measure from 1 to 10 of sturdiness and stability in an installed fixture such as a counter-top, toilet, wall, etc. The sturdiness or stability of the fixture is tested by the act of vigorously fucking upon or against the installed fixture until the fixture either becomes disengaged from its mounted surface or the fucking is completed without structural failure. If the fixture fails at any point during the Fuck-on-ability Rating test procedure, it cannot be re-installed and the project must continue without the failed fixture.
A fucked B on the toilet that was just installed for an hour straight and it is still held tight against the floor without any leaks. It is Fuck-on-able (Fuck-on-ability Rating) of 10.

C fucked D on the countertop that was just installed for less than 30 seconds before it completely ripped out of the wall, sending both C and D to the ground in a filthy admixture of lumber, metal, and shame. The countertop is NOT Fuck-on-able (Fuck-on-ability Rating) of 1. The countertop may not be re-installed and the apartment or house must be completed without a countertop.
by spasmolytic October 15, 2011
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a guy who's hot enough that you just wanna go to town on his junk regardless of not knowing a single thing about him

aka: this is another way to categorize the instant hotness/appeal (suckadickability) of a guy
for example, a friend shows you a pic of a guy on facebook or myspace or what have you, and you in turn, can say: "nah, he's not suckadickable (suck-a-dick-a-ble; suck-a-dick-able)", meaning he's not hot enough on a purely physical level

like, the guy is not gonna make you hot enough to take his cock into your eager mouth just like that at first sight
by arcoandy June 27, 2009
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