Someone who passes, someone who makes a pass(noun)
A football player who makes a forward pass, who may be (but not limited to) the quarterback.(noun)
One who passes; a passenger.(noun)
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Use "passer" in a sentence
"The famed passer from the University of Alabama required surgery on a severely damaged right knee 23 days after he signed, and he was so gimpy-legged that fans held their breath every time he went down, but he made it, all right."
"Needed some LB depth and got it in third round with Philip Wheeler, who can run and rush the passer from the edge."
"A two-time NFL MVP (1989, '90), Montana twice led the NFL in passer rating and was the fifth quarterback ever to throw for 40,000 yards."