Your boat, gently down the stream...
It has a lot of mussels.
Nothing, he just waved. Christmas crackers are the worst.
Omega!! Note: surely it already exists but I thought of it independently and am proud of my terrible joke!
Psi...
The same reason they sing Hymns instead of Hers!
Hammy' - as sung by Al Jolson!
Naval oranges. I'msosorry.
He thought nothing could possibly travel faster than sea.
Because in space, no one can hear you stream.