The quality by which a penis is described in terms of how prime it is for being given a blowjob, or to be sucked at all. (factors include: length, width, etc.) *can be described in quantitative or qualitative terms*
Franklin: Thomas, how was your date with Megan last night?
Thomas: It went wonderfully, she sucked my dick.
Franklin: I'm not surprised, your dick's suckability is OVER NINE-THOUSANDDDDD!!1
the quality or trait of suckiness, or just being sucky or the state of sucking
1. Ever since the Spice Girls hit it big, "teen pop" has ruled the airwaves and pop music has been awesome in its flat-out suckability.
2. TV today has a high degree of suckability.