Louis Tomlinson -- One Direction Singer PUKES After Soccer Collision

I think it went blech, blech, blech ... I think it went grrble, grrble, grrble ...

So, it wasn't exactly the Best Puke Ever ... but Louis Tomlinson from One Direction yacked his face off during a charity soccer match in Europe this weekend ... and it was all caught on tape.

The boy bander had just passed the ball off to a teammate, when Gabriel Agbonlahor -- a really good pro soccer player -- came flying in and knocked Louis on his ass.

Louis rolled around in pain clutching his leg (like soccer players do) ... but eventually got up and made his way to the sidelines.

But as soon as he got off the field, Tomlinson upchucked ... spewing all over the sidelines.