Skinny cap 

Used in graffiti as a nozzle cap that makes your spray area small and skinny to make sharp lines

I can't outline without my skinny cap!

Skinny cap by Stash77176192 March 8, 2015

Skinny Captain 

A rum and coke served with Diet Coke and Captain Morgan's Spiced Rum.

I asked for a Skinny Captain, but the bartender said he was out of Diet Coke

Skinny Captain by eyelukard December 9, 2008

Captain Skinny-Dick 

Someone who is short tempered, frequently asserts themselves over others, and wrongly accuses people for things they didn't do. They are usually a complete asshole as well.

Joe: "Did you hear about what Bob did yesterday?"

Tom: "Yeah, he took control of the Soup Kitchen, claimed himself as King of the Homeless, and then accused the lead chef of murdering his cat."

Joe: "Yeah, he's a Captain Skinny-Dick"

Captain Skinny-Dick by SucklinTeets June 16, 2014