Marshmallow kiss
When a person gives head( blow job ) and kisses someone, there is then a long white string attached from one persons lips, to the other. The white stringy substance is cum.
Guy: eww wtf, did you just give me a marshmallow kiss?!
Girl: umm, i guess. Since we're here i'm gonna go ahead and tell you, i've been cheating on you.
Girl: umm, i guess. Since we're here i'm gonna go ahead and tell you, i've been cheating on you.
Marshmallow kiss by V.r.d. 619 December 31, 2011
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