Trunk-thing
From Wookieepedia, the Star Wars wiki.
The trunk-thing was an alien of an unknown species (and even gender) who played sabacc with Lando Calrissian, Lob Doluff, Bassi Vobah, and Del Cycer on Oseon 6845 in 4 BBY. It wore a Rafan life-crystal, seemed to be a nervous type, and didn't seem to be a very good gambler.
Whatever species it was a part of had a long proboscis and green blood. It also had blue irises and bloodshot eyes, though whether these were species traits or specific to it alone is unknown. It pronounced l and r sounds as w.
None of its fellow players could remember, much less pronounce, its real name, so they mentally nicknamed it the trunk-thing after its most distinguishing feature.
