What is Cactusing?
1.
A type of prank calling which originated within a small communtity of phreakers called the Phone Losers Of America. The point is to tie the word "cactus" into the prank call as many times as possible without sounding like a prank call.
Murd0c is planning on cactusing this catholic suicide hotline later.
See
2.
masturbation at its finest. With or wittout artifical lube.
Jim likes to use astroglide while cactusing