Alternate spelling for come. Some people make a distinction between cum , the noun, semen, and come , the verb, to reach orgasm. From porno moviebox covers: ' cum and get me / cum rain, come shine / compendium / cum one, cum all '. See ejaculation and semen for synonyms.
Quote: Duffy (Gene Wilder) and Dr. Benjamin (David Margulies) in Funny About Love (1990): -- Duffy: ' You want me to put some sperm into this little cup? ' -- Doctor: ' That's right, Mr. Bergman. (...) ' -- Duffy: ' Wait a minute! You know, you make this sound easy, but I've never done this before.' -- Doctor: ' Come, come, Mr. Bergman.' -- Duffy: ' Twice!? You want me to do it twice. We'll be here all day.'