Wiktionary
suckable
a. Able to be sucked, or suitable for sucking
Usage examples of "suckable".
I licked the last drop of coffee from the cup, ran my tongue over the hotcake plate, inspected my sleeves for suckable syrup stains.
She snaked her tongue all around the edge of a pair of perfectly painted, suckable lips.
Her frame appeared slight, so it went to follow that her breasts would be small with suckable little red nipples.
He felt a saturating sense of death, a dread in the soft filling of his bones, the suckable part, approaching Galveston now.