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1.
When a girl grabs the back of your head and buries your face inside her tits.
I love going to the strip clubs for some titty tacos.
by N Jacobs June 23, 2004
 
2.
A tit fuck involving the use of taco sauce and lettuce as lubricant. The titties therefore create the "taco shell" and it is up to you to supply the meat and sour cream.
PersonA: Dude, what is that smell? It smells like a Mexican restaurant.
Person B: I just recently executed a titty taco, and that sir, is the well-earned smell of victory.
by mr.sanchez25 September 26, 2011
 
3.
The act of placing taco making materials in between a large breasted girls tits, and nom noming all night long.
Man, i'd like to make titty tacos inbetween her titties.
by TacoKing0192 January 23, 2011