To have a strong desire to urinate while lacking the proper setting in which to relieve yourself.
To want to pee but not have a bathroom around. Sometimes accompanied by a pee pee dance and your friends talking about Niagara Falls and water related topics.
Driver: Sorry bro, we don't have a planned bathroom break for exactly 68 minutes. There are some bottles back there so make a urine bomb. I can't stop I've got to make highway time to our destination.