Tcl 

Tool Command Language, 1988-today. A dynamic programming language for Mac/Unix/Windows computers. It can be considered as merging the heritages of Lisp, C, and Unix shells. With a very simple syntax Tcl makes it possible to implement a number of programming styles: functional, object-oriented, stack-oriented, etc.

proc lrevert list {#-- revert a list in Tcl
set res {}
set n llength $list
while {$n>0} {lappend res [lindex $list incr n -1]}
return $res
}
% lrevert {foo bar grill} ;# testing Tcl
grill bar foo

Tcl by Richard Suchenwirth September 18, 2008

tcl 

A very powerful language

"TCL is very powerful, I'm a mastery at basic syntax"

tcl by Jdawg140 March 25, 2008

TCL 

Toking Coughing Laughing

Used as a response like “lol” “rofl” “coi”(crying on the inside)

for a more descriptive response and mood
Possibly a forewarning

Txt from Emily: OMG, I can’t believe I texted him that.
Sarah: WTF did you text him?
Emily: I can’t even.
Sarah: TCL.

Or

Jake: What’s up?
Alex:TCL.

TCL by Bossy_Side.of.Saucy January 31, 2020

TCL 

The Collective Losers.

person: i’m so horny!
person 2: omg i love the TCL groupchat

TCL by Bloody Vcgina July 13, 2021

TCL 

In reference to Gaia Online's MMORPG-- TCL means "Ten CL", the highest level attained in the Beta release of Gaia Online's MMORPG, "zOMG!"

"Oh My God, a TCL killed all the monsters!"

TCL by Cassiopeian September 9, 2009

TCL 

An acronym for The Collective Losers.

I love TCL!

TCL by TCLsBiggestFan April 29, 2021

TCLTC

Initially (no pun intended) conceived to convey a simple message concerning a celebrity's sexual preference: Tom Cruise Loves The Cock. Nowadays it's also used as a reference to keep other celebrity news in perspective.

It's rumored that Angelina Jolie has adopted Gary Coleman in an unprecedented display of community outreach.

Oh, and TCLTC.

TCLTC by pinto1775 May 17, 2006