Portmanteau of vagina and itch; a feminine form of jock itch. Heard mostly in medical circles, and is one of the less-used terms that was first widely attested in Sam Shem's "The House of God".
"I went in. Nine times out of ten in that room it would be small-time: V.D., vagitch, urinary, or tuna."
-Shem, Sam (1978). "The House of God". p.206.