Castach is originated form an army term or more like it an initials of an army term called "Lechsot et Hatachat" which means covering your ass.
For example in many cases especially in voluntary armies a sergeant / commander doing things in order to say "I followed Procedure" that act is called "Castach" which is as mentioned "Covering Ass".
Alternate method of saying “Cover me with cum”
John: Cover me with sunshine ~~
Dani: Ok where at what time
When you play along to a song from an iPod or mp3 on drums and then upload it to a website WITHOUT any music in the background.
That guy did a really good drum cover solo!
When your balls are deep in an African American woman's mouth
I can't leave her, I would miss my chocolate covered walnuts
A black person that is gay
Black kid : Shut up tom,
Tom:Shut up you chocolate cover strawberry
Teacher: tom why did you called him that
Tom: because he is chocolate on the outside and fruity in the inside
Refers to the latest news/updates about your friends and relatives. Another word for What's Up which is very common in tech world.
John - Hey Ray, What's Your Cover ?
Dave - I am just done with my dinner.
The act of blowing a Rasbery into someones butthole while having sex.
"How'd it go with Tiffany last night?"
"Pretty good, I gave her a chocolate covered rasberry and blew her up like a ballon!"