suckly adjective2 •(nonstandard, rare) Tending to, apt to, prone to, or desirous to suck.Those of us who are aware that we DO suck strive to remedy it and thus continually improve. Those who are not aware that they suck only grow sucklier day by day." — 2006 •(nonstandard, rare) Causing desire to suck or be sucked; suckable; succulent.I know my cherries, I've had many cherries, every shape of suckly melons, for they come in many shapes, [...] — 1993 formsmore suckly · sucklier · most suckly · suckliest