To feel completely infinite, while with a close friend or complete stranger. For once in your life, to be understood and to understand fully, without an explaination. There is usually no touching involved, only presence. Usually felt when listening to music; good music, not rap shit.

Sometimes used as soulrape.
"Sometimes, when we are together, I feel like we are soulfucking each other..."

"All Bobby and I do is soulfuck all night long."

"I'm going to rape your soul."

by J. Alexa Leigh Rowe September 10, 2008
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An adjective used to describe an incredily traumatic or unpleasant experience.
"My car was stolen yesterday, I am so pissed; what a soulfuck, man."
"My grandfather just died, I am so upset. It's quite the soulfuck to lose someone close to you."
by Samantha (BoomSass) November 14, 2006
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