A term most commonly used to describe crumbs of skunk (or cannabis) given in exchange for a cup of tea.
This can also be abbreiviated to "T's for C's", which can easily be communicated through hand gestures for time efficiency or when you've had to many crummies.
Where are my crummies?
Did you sit on my crummies?
How about those crummies?
T's 4 C's?
Something that is rubbish, crap or shitty. Other usages include shizzyswaar for added impact or shiz as an abbrieviated term.
"The shiz" refers to something that is very good. Shiz just used on its own however is used to describe something that is bad.
This lack of crummies is shiz.
Your face is shizzy.
What a shizzyswaar, the ningas are coming to kick my ass!
These crummies are the shiz!