Upon smoking or injesting copious amounts of marijuana, the user will become anxious, perhaps having a panic attack, his or her hands and arms will become tingly and start to numb from sheer terror resulting in the effect that the tendons and the capillaries in the hands will contract inwards causing a crab-like appearance to the entertained folk observing the phenomenon.
"We ate a couple of Goo-balls and he really started to crab-up!"
Finding an empty urinal, pulling your pants down to your ankles and half-squatting whilst shuffling side-to-side with your hands making a crab-like motion above your head.
Wow, look at this empty urinal. Check this crab-slash bro.
Hey! Did you see Tom’s crab-slash? That guy went full Zoidberg.
girl 1-"yo gurl i can see yo crab swing in dat skurt"
girl 2-"othx"
The guy who is playing the smallest violin.
Oh boo hoo let me play a sad song for you on the worlds smallest violin - Mr Crabs
WHen the insides go all itchy. Usually caused by a build up of dust or by unauthorised access from a filthy hard drive.
My PC is suffering from computer crabs
When a woman bends over backwards on all 4 and performs oral sex
She gave me a hungry crab and that’s why I married her!
Used in conjunction with "cunt cake" to describe a disgusting std ridden vagina that contains pubic lice
Dude: Man, that girl is so fine
Dude's friend: Trust me bro, you don't want that cunt cake... it comes with the creepy crawly crabs package