Tipping is when you are doing just slightly better than your bro. In other words you have established your dominance as the pitcher in the relationship but you cannot put more than your tip in, hense the phrase tipping
"I got an 89! I'm so pumped. How about you?"
"Dude I so just tipped you. I got a 90, fuck yes!"
"Damn, you always tip me in everything!"
Rebecca is wearing those jeans that showcase her huge muffin top; someone needs to tell her she looks like a tip.