To intersert instruments such as, Penis, Fingure ect.. in a subjects anus forcefully while they are unaware.
while having sex with you're girlfriend, quickly pull out the penis or use the index fingure and forcefully insert it inside her anus while she is unaware it and say "Crisscross" before she kills you.
This is a tridition to all and a must try for all you dare devils.
When two males urinate over the bowl simultaneoulsy causing the urine to crisscross and form into one stream.
Ubs and Butchie did a crisscross after drinking a case of beer.