I think this song is about denial. He's denying that a broken relationship was more serious than it was. The way that he keeps repeating the word meaningless and the 'yes yes yes' part make it sound like he's trying to convince himself.
and the lines,
"and if some dim bulb should say
we were in love in some way
kick all his teeth in for me
and if you feel like keeping on kicking
feel free"
are quite violent like he's trying to kick the meaning out of the relationship to save him from being too sad about the break up.
I think this song is about denial. He's denying that a broken relationship was more serious than it was. The way that he keeps repeating the word meaningless and the 'yes yes yes' part make it sound like he's trying to convince himself.
and the lines, "and if some dim bulb should say we were in love in some way kick all his teeth in for me and if you feel like keeping on kicking feel free" are quite violent like he's trying to kick the meaning out of the relationship to save him from being too sad about the break up.