can i tip through the app

A sentence commonly used by Uber riders towards Uber drivers as a way to avoid offering a cash tip without feeling guilty.

“Hey, can I tip through the app now?” ... “yeah Uber added that recently.” ... “oh awesome I will totally do that!” ... (the tip never shows up)

tech tip

anything written by a virgin

virgin: "tech tip: you can code using c++"
fbi: "virgin detected"

Tip lash

Neck injury sustained (or given) during doggy style sex

I hit it so hard I gave the girl tip lash

(OTT) on the tip

when a woman behaves in a ridiculous manner, showing favor to man soley based on his physical appearance. Making the moment an awkward or uncomfortable situation.
Almost as uncomfortable as sexual harassment, hence the phrase "on the tip".

A man is giving a speech, and while he is speaking a woman repeatedly points out a positive description of his physical features. Then another guy would feel that this woman is (OTT) on the tip of the guy she seems obsessed with.

Tipping The Bottle

To "tip the bottle" is to make a mistake, usually drastic. The phrase derives its meaning from the idea that spilling a bottle of liquor or beer is a major fuck-up; tipping (or rather spilling) the bottle.

Tipping The Bottle: "Damn, Draco and Beau tipped the bottle again, I knew we couldn't trust them to do what we asked!"