A gooey, soft, yet not liquid excretion from one's anal region. Usually caused by excessive caffeine or cigarette consumption (or a combination of both.) Can consist of particulate matter or be purely velvet in texture.

A true soft launch should not cause pain such as with diarrhea.
Hey guys, We have to go. I farted but it turns out I soft launched. I need to change my clothes.
by SoftLaunchingMissiles August 05, 2009
A situation that occurs when a man is doing a girl and he can't get his penis fully erect. Doing a girl with a semi.
Rob: Man, I was so messed up the other night I was having a hard time getting it up

Edward: What did you do?

Rob: It was all good, I gave her the soft launch.
by brownie85 December 22, 2008

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