Seek out the service of prostitutes. It refers to the increasingly common phenomenon in many parts of the world of strippers hanging out under the bridges and similar places at night to find potential customers.
Bisleri: Oh man the work and family obligations is killing me, I need to catch a break.
Verb: The act of performing a spit roast while a male takes the crab position beneath the female, with head placed between the penetrating male's legs while receiving a tit wank from the females low hanging breasts. This person may or may not lick the balls of the penetrating man.
Guy 1: "Yo CB3 was the Crab Under the Bridge and started tounging my balls."
Guy 2: "I'll have to try that sometime with Loz and Haz."
If something belongs to the past and isn't important or troubling any more, it is water under the bridge.
-I can't believe I broke up with Jason, I miss him so much!
-Woman, it's been 2 months already, and he hasn't called you!
it's water under the bridge...