From Middle English underthrowen, equivalent to under- + throw.
underthrow (third-person singular simple present underthrows, present participle underthrowing, simple past underthrew, past participle underthrown)
- To throw a pass that falls short of the receiver. (May take either the thrown pass or the receiver as its direct object.)
1960, December 27, “Joseph M. Sheehan”, in Eagles Win, 17-13, To Take Pro Title:
- The underthrown pass was knocked down.
2008, December 26, “Joshua Robinson”, in Jets Say Third Down Is Their Priority:
- During the Jets’ recent 1-3 slide, Favre has repeatedly missed and underthrown receivers on his way to a single touchdown pass and six interceptions.