change in tide

~When a straight person decides to play for the other team
~Becomes gay

Dude: I'm so happy with you!

Girl: About that...
Dude: What is it?
Girl: Let's just say there was a slight change in tides...

change the tide

When you piss at an angle causing a whirlpool in the bowl, then mid-stream, switch angles causing the urine to come to a halt before drifting the other way. Commonly done when taking an absurdly long piss.

Sorry I took forever guys. I had to change the tide in there and got some splash back...