When the female partner is on her period and while having intercourse the male ejaculates inside of her. Therefore, causing the blood and sperm to run down her leg like the sauce and cheese of a hot piece of lasagna.
My friend was having sex last night and didn't know she was on her period until he pulled out and saw a piece of hot lasagna on her thigh.
by Kendog Texan January 13, 2009
Get the Hot Lasagnamug.