Þorvaldr (inn) veili ("the Ailing") was an Icelandic skald who lived in the last part of the 10th century.
According especially to Snorri Sturluson's Ólafs saga Tryggvasonar, he had composed defamatory verses (níð) about Þangbrandr, a missionary sent to Iceland by Óláfr Tryggvason.
[1] When Þangbrandr arrived in his area, in Grímsnes, Þorvaldr gathered a troop to slay him and his companion Guðleifr Arason.
But the priest was forewarned and Þorvaldr was eventually killed: As he was setting his trap, Þorvaldr had asked the skald Úlfr Uggason to lend him assistance against the "effeminate/sodomitic wolf to the [pagan] gods"[3] (argr goðvargr), but Úlfr refused to be involved.
This drápa was remarkable for being refrainless (steflaus) and composed in a variant of skjálfhent.