What does TCL mean?
Tool Command Language. This is for tecchies when they're using that black box screen on the computer and type in commands.
Other definitions of TCL:
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How to use the term TCL:
Whoa you're changing your password via TCL?!
More slang terms:
Laughing my a** of while rolling on the floor
Turn around, 180 degrees
Out Of Sight, Out Of Mind
One Thing Led To Another