It is done to be able to fit more activities into the day by combining two activties into one without having to go through the hassle of cleaning up after a wank.
Colin: well i've adopted this new programme into my life called shanking which applies a wank in the same time as i shower killing two birds with one stone and without the effort of not having to clean up after my intense wanking.
When one SHits in his hand and wANKs = SHANK.
Could possibly mean they are homosexual.
Hey man, I ran outta lube. Thats ok you can always shit in your hand and wank or have a "shank" if you like.
2. A stab in which a shanking knife "shanks" you right below the rib, or into the rib.
Excuse me, but i found a shank in my silverware napkin
Ouch. That shank really hurt. Don't do it again cracker.