Indicates for how many successive days you can live on pasta (plain or with something) without turning grumpy. Especially important when you are a poor student. If you are beyond your pasta tolerance treshold (PTT) you might want to switch to rice, polenta, potatoes etc. for a few days until you reach, for example, your rice tolerance treshold (RTT).
"Ey dude, pasta for dinner tonight?"
"No man, I'm really beyond my Pasta Tolerance Treshold. I'm going for rice instead."
"Alright, I see what you mean. Your PTT is not to be messed with!"
When one girl is being taken from behind by one dude and at the same time his buddy fucks here in the mouth and they highfive at the same time. This all results in an extraodinary resemblance of the London tower bridge. Therefore this girl is being towerbridged.
Wow dude thats a hot chick man
for real we got to towerbridge that ass man.
Yeah we gonna be towerbridging tonight!