tmtc 

A French acronym.
"Toi Même Tu Sais" (a sort of "You Know What I Mean")

Generally use by wesh girls in a private joke with friends.

Trop bien ces délires avec toi emilie, tmtc!!!

tmtc by GoldMath June 12, 2012

TMTC 

Too many to count, mostly used in industry where counting things comes up but it could also be used in every day language, as in:
Q: damn looket all dem foos! how many u think there are?
A: TMTC

the number of bacterial colonies on my peetre dish was over 200 therefour it was TMTC.

pennies in the jar are TMTC

TMTC by Burger Lord November 2, 2004

tmtctmtsts 

Abbreviation for The More Things Change The More They Stay The Same. A comment used when a thing has remained unchanged though time passes. Sometimes abbreviated to tmtc or the more things change.

That guy who we saw talking loudly to himself in Central Park five years ago is still there. tmtctmtsts

tmtctmtsts by amelie1 February 26, 2010