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1.
derived from the Spanish word for milk, "leche"

1. refers to the act of ejacuation, particularly in a degrading manner, such as on a woman's face.

2. The physical substance of semen.
I gave that bitch a serious lechaso in the eye.
by pimpdaddy May 28, 2003
 
2.
" leche "(what an erected penis spits) but in big amounts
She always ask for more than one lechaso
by jako July 26, 2003
 
3.
spanish slang for cumshot usualy to the face
ella se puso de freca y le pege un lechaso entre la cara
by playa 19 June 12, 2009