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1.
The sound made while in the act of masturbation.
Mother: What's that strange spleeching sound coming from?

Son: Dude, she can hear my spleech... gross
by IWillRapeYo February 05, 2010
 
2.
n. jizz, sperm, male seminal fluid

adj. the color of semen

v. jizz, cum, ejaculate
v. - he spleeched on her face.

adj. - now she has spleech hair.

n. - there is also spleech all over the carpet.
by JunkInTheDrunk January 20, 2011