to be used with the term "BEEF". when you have a problem with someone or something but you wait for the right time to "cook" the be "BEEF" so you marinade.
man i had some beef with this foo but i hade to let that shit marinade!!
The act of a Mormon inserting the penis inside the vagina without further movement and believing that it is not considered having sex. Therefore the most bullshit way to justify sinning in their religion.