We got nothing but time under the bridge

This one was overheard at an administrative hearing.  It is a mash up of “nothing but (time)” (only; just) and “water under the bridge” (past and unchangeable events).  Perhaps the speaker was thinking of the song “Sittin’ on the Dock of the Bay”:

I’m just sittin’ on the dock of the bay, Wastin’ time.

Or maybe “Under the Boardwalk”, where one just is “havin’ some fun”?  Or perhaps the speaker just likes to spend time under bridges.  We’ll never know.  A big thank you to Bill Belanger for hearing this one and sending it in!