Does Kinzie ever use her safe word ingame in Saints Row?

Solution 1:

I extracted and listened to all of Kinzie's dialog, and while she has a lot of it (752 clips), there aren't too many uses of her safe word. Which would mean it is likely a good safe word as it isn't something she says in ever day conversation. Below are references to her safe word.

Kinzie

• In conversation with Tanya about the brothel
• As a reaction, likely to surprise or injury or something

• Someday we should probably name this ship. I've been giving it a lot of thought and I think we need a name that confuses our enemies by seeming innocuous to the uninformed. That's why I'd vote for Tea Cup.

Others

• "Hello Teacup" is the name of the mission where you find Kinzie

Solution 2:

In Gat out of Hell, Kinzie does actually use her safe word a couple of times, but it's a random response spawn in each action, triggered by different events...

Easy Kill
"Should've said 'teacup'."

Burn or Explosion Damage
"Teacup! Teacup!"

Kinzie has to be one of my favourite homies, and touches like that are a lot of fun in GOOH. I'd also point out that you get a very different reaction from the twins (Kiki & Viola) if you approach them with Kinzie, as Kinzie and Viola (as it happens) have bonded between SRTT and SRIV.