The act of being fellated by a woman while standing (she's on her knees), cumming in her mouth, and pulling a quick 180 to then fire out a log into her cum-filled orifice.
Event form:
I'd been eating fiber bars all day to prepare for our Oral Hershiser.

Verb form:
She gave me oral, then I spun around and hershised that bitch.
by johnnyg11141983 March 17, 2008
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When a female is giving you dome and somehow blows out her elbow like a major league pitcher.
Q: Why are you wearing a sling?
A: Well I was giving this guy and Oral Hershiser the other day and I ended up needing Tommy John surgery.
by Themaskedcrusader June 19, 2009
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